Lesson 1. FILIPINO/ENGLISH
A.

Mga Bugtong
1. Heto na ang magkapatid, nag-uunahang pumanhik.
Sagot: Mga paa
2. Dalawang batong itim, malayo ang nararating.
Sagot: Mga mata
3. Kay lapit-lapit na sa mata, di mo pa rin makita.
Sagot: Tenga
4. Dalawang punsu-punsuhan, ang laman ay kaligtasan.
Sagot: Suso ng Ina
5. Batong marmol na buto, binalot ng gramatiko.
Sagot: Ngipin
6. May tubig na pinagpala, walang makakakuha kundi bata.
Sagot: Suso ng Ina
7. Baboy ko sa pulo, ang balahibo’y pako.
Sagot: Langka
8. Nakayuko ang reyna di nalalaglag ang korona.
Sagot: Bayabas
9. Isang prinsesa nakaupo sa tasa.
Sagot: Kasoy
10. Ate mo, ate ko, ate ng lahat ng tao.
Sagot: Atis

RIDDLES
1. What has to be broken before you can use it?
Answer: An egg
2. Riddle: I’m tall when I’m young, and I’m short when I’m old. What am I?
Answer: A candle
3. What month of the year has 28 days?
Answer: All of them
4. What is full of holes but still holds water?
Answer: A sponge
5. What question can you never answer yes to?
Answer: Are you asleep yet?
6. What is always in front of you but can’t be seen?
Answer: The future
7. There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow
furniture. What color are the stairs?
Answer: There aren’t any—it’s a one-story house.
8. What can you break, even if you never pick it up or touch it?
Answer: A promise
9. What goes up but never comes down?
Answer: Your age
10. A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head
wet. Why?
Answer: He was bald
B.

MGA KASABIHAN
1. Kapag makitid ang kumot, matuto kang mamaluktot.
 Kapag mahirap ang buhay, matuto kang pagtiyagaan ang sitwasyon.
2. Ang mabuting ugali, masaganang buhay ang sukli.
 Kapag mabuti ang iyong kalooban, tiyak na ikaw ay pagkakalooban ng masaganang pamumuhay.
3. Kung may tiyaga, may nilaga.
 Kapag matiyaga ka at masipag, paniguradong may magandang bunga ito.
4. Ang kaginhawaan ay nasa kasiyahan at wala sa kasaganahan.
 Hindi nasusukat sa kung anong mayroon ka ang kaginhawan ng iyong buhay. Ito ay nakabase sa
kung gaano ka kasaya sa buhay.
5.
Walang umaani ng tuwa, na hindi sa hirap nagmula.
 Lahat ng daan patungo sa tagumpay ay may kaakibat na kahirapan na kailangang lampasan.
6. Ang gumagawa ng kabutihan, hindi matatakot sa kamatayan.

Kapag mabuti ang iyong gawain, kailanma’y hindi ka matatakot sa mamatay at husgahan sa
kabilang buhay.
7.
Ang tunay na kaibigan sa ligaya at kalungkutan, ikaw ay sasamahan.

Nasusukat ang pagkakaibigan hindi lang sa ligaya kung hindi ay pati sa kalungkutan.
8. Walang mahirap na gawa kapag dinaan sa tiyaga.

Kahit anong gawain ay matatapos o malalampasan kapag ikaw ay matiyaga.
9. Kung ano ang itinanim ay siya rin ang aanihin

Kung ano ang iyong ginagawa ay siya rin ang gagawin sa’yo. Kapag ito ay kabutihan, ikaw rin ay
makakatanggap ng kabutihan o gagawan ng mabuti ng ibang tao.
10. Ang batang hindi nagsasabi ng katotohanan ay hindi maaasahan.

Tunay na hindi ka makaasa sa bata man or matanda na hindi nagsasabi ng katotohanan.

PROVERBS
1. A bad workman always blames his tools.
This proverb is used when someone blames the quality of their equipment or other external
factors when they perform a task poorly.
2. A bird in hand is worth two in the bush.
Things we already have are more valuable than what we hope to get.
3. Absence makes the heart grow fonder.
When people we love are not with us, we love them even more.
4. A cat has nine lives.
Cat can survive seemingly fatal events.
5. A chain is only as strong as its weakest link.
One weak part will render the whole weak.
6. Actions speak louder than words.
Actions are a better reflection of one’s character because it’s easy to say things, but difficult to act
on them and follow through.
7. A drowning man will clutch at a straw.
When someone is in a difficult situation, s/he will take any available opportunity to improve it.
8. Adversity and loss make a man wise.
We gain wisdom faster in difficult times than in prosperous times.
9. A fool and his money are soon parted.
Foolish people do not know how to hold on to their money.
10. A journey of thousand miles begins with a single step.
Howsoever big a task is, it starts with a small step.

STREET SIGN
Zigzag sign ahead
Papalupot ang kalsada sa unahan
Approach to intersection
Babala ng sangandaan
Sharp turn (left)
Delikado ang kurbada sa kaliwa
Sharp turn (right)
Delikado ang kurbada sa kanan
River bank
Ilog
Animal crossing ahead
Tawiran ng hayop*
Men working ahead
Ginagawa ang kalsada*
Double bend ahead, first to the
left
Doble ang kurbandang delikado sa
kaliwa

DYARYO
LESSON 2. SCIENCE

NEW TECHNOLOGY
ZWILLING ENFINIGY POWER BLENDER
It is efficiently and quickly blends everything from leafy
kale to tough almonds and cashews. A razor-sharp
winglet blade, 12 variable speed settings and a sturdy 64
fl. oz. Tritan jar make it a do-everything blender for the
modern kitchen.
USAGE:
-
Lid is dishwasher safe
-
To clean blender jar, fill with 17 fl. oz water, add a few drops of dish soap and start
the cleaning program. Then, rinse jar with running water
-
Unplug base and wipe clean with damp cloth
BENEFITS:
With the Enfinigy Power Blender, you can expect fast, efficient results blending everything from kale to
nuts. This is the ideal blender for larger quantities and customized tasks. The six programmed settings
include: Pulse, Smoothie, Cocktail, Ice Cream, Ice Crushing, and Cleaning
LESSON 6.

HISTORY OF COMPUTER
The computer was born not for entertainment or email but out of a need to solve a serious numbercrunching crisis. By 1880, the U.S. population had grown so large that it took more than seven years to
tabulate the U.S. Census results. The government sought a faster way to get the job done, giving rise to
punch-card based computers that took up entire rooms.
Today, we carry more computing power on our smartphones than was available in these early models.
The following brief history of computing is a timeline of how computers evolved from their humble
beginnings to the machines of today that surf the Internet, play games and stream multimedia in addition
to crunching numbers.
1801: In France, Joseph Marie Jacquard invents a loom that uses punched wooden cards to automatically
weave fabric designs. Early computers would use similar punch cards.
1822: English mathematician Charles Babbage conceives of a steam-driven calculating machine that
would be able to compute tables of numbers. The project, funded by the English government, is a failure.
More than a century later, however, the world's first computer was actually built.
1890: Herman Hollerith designs a punch card system to calculate the 1880 census, accomplishing the task
in just three years and saving the government $5 million. He establishes a company that would ultimately
become IBM.
1936: Alan Turing presents the notion of a universal machine, later called the Turing machine, capable of
computing anything that is computable. The central concept of the modern computer was based on his
ideas.
1937: J.V. Atanasoff, a professor of physics and mathematics at Iowa State University, attempts to build
the first computer without gears, cams, belts or shafts.
1939: Hewlett-Packard is founded by David Packard and Bill Hewlett in a Palo Alto, California, garage,
according to the Computer History Museum.
1941: Atanasoff and his graduate student, Clifford Berry, design a computer that can solve 29 equations
simultaneously. This marks the first time a computer is able to store information on its main memory.
1943-1944: Two University of Pennsylvania professors, John Mauchly and J. Presper Eckert, build the
Electronic Numerical Integrator and Calculator (ENIAC). Considered the grandfather of digital
computers, it fills a 20-foot by 40-foot room and has 18,000 vacuum tubes.
1946: Mauchly and Presper leave the University of Pennsylvania and receive funding from the Census
Bureau to build the UNIVAC, the first commercial computer for business and government applications.
1947: William Shockley, John Bardeen and Walter Brattain of Bell Laboratories invent the transistor.
They discovered how to make an electric switch with solid materials and no need for a vacuum.
1953: Grace Hopper develops the first computer language, which eventually becomes known as COBOL.
Thomas Johnson Watson Jr., son of IBM CEO Thomas Johnson Watson Sr., conceives the IBM 701
EDPM to help the United Nations keep tabs on Korea during the war.
1954: The FORTRAN programming language, an acronym for FORmula TRANslation, is developed by a
team of programmers at IBM led by John Backus, according to the University of Michigan.
1958: Jack Kilby and Robert Noyce unveil the integrated circuit, known as the computer chip. Kilby was
awarded the Nobel Prize in Physics in 2000 for his work.
1964: Douglas Engelbart shows a prototype of the modern computer, with a mouse and a graphical user
interface (GUI). This marks the evolution of the computer from a specialized machine for scientists and
mathematicians to technology that is more accessible to the general public.
1969: A group of developers at Bell Labs produce UNIX, an operating system that addressed
compatibility issues. Written in the C programming language, UNIX was portable across multiple
platforms and became the operating system of choice among mainframes at large companies and
government entities. Due to the slow nature of the system, it never quite gained traction among home PC
users.
1970: The newly formed Intel unveils the Intel 1103, the first Dynamic Access Memory (DRAM) chip.
1971: Alan Shugart leads a team of IBM engineers who invent the "floppy disk," allowing data to be
shared among computers.
1973: Robert Metcalfe, a member of the research staff for Xerox, develops Ethernet for connecting
multiple computers and other hardware.
1974-1977: A number of personal computers hit the market, including Scelbi & Mark-8 Altair, IBM
5100, Radio Shack's TRS-80 — affectionately known as the "Trash 80" — and the Commodore PET.
1975: The January issue of Popular Electronics magazine features the Altair 8080, described as the
"world's first minicomputer kit to rival commercial models." Two "computer geeks," Paul Allen and Bill
Gates, offer to write software for the Altair, using the new BASIC language. On April 4, after the success
of this first endeavor, the two childhood friends form their own software company, Microsoft.
1976: Steve Jobs and Steve Wozniak start Apple Computers on April Fool's Day and roll out the Apple I,
the first computer with a single-circuit board, according to Stanford University.
The TRS-80, introduced in 1977, was one of the first machines whose documentation was intended for
non-geeks
The TRS-80, introduced in 1977, was one of the first machines whose documentation was intended for
non-geeks (Image credit: Radioshack)
1977: Radio Shack's initial production run of the TRS-80 was just 3,000. It sold like crazy. For the first
time, non-geeks could write programs and make a computer do what they wished.
1977: Jobs and Wozniak incorporate Apple and show the Apple II at the first West Coast Computer Faire.
It offers color graphics and incorporates an audio cassette drive for storage.
1978: Accountants rejoice at the introduction of VisiCalc, the first computerized spreadsheet program.
1979: Word processing becomes a reality as MicroPro International releases WordStar. "The defining
change was to add margins and word wrap," said creator Rob Barnaby in email to Mike Petrie in 2000.
"Additional changes included getting rid of command mode and adding a print function. I was the
technical brains — I figured out how to do it, and did it, and documented it. "
The first IBM personal computer, introduced on Aug. 12, 1981, used the MS-DOS operating system.
The first IBM personal computer, introduced on Aug. 12, 1981, used the MS-DOS operating system.
(Image credit: IBM)
1981: The first IBM personal computer, code-named "Acorn," is introduced. It uses Microsoft's MS-DOS
operating system. It has an Intel chip, two floppy disks and an optional color monitor. Sears & Roebuck
and Computerland sell the machines, marking the first time a computer is available through outside
distributors. It also popularizes the term PC.
1983: Apple's Lisa is the first personal computer with a GUI. It also features a drop-down menu and
icons. It flops but eventually evolves into the Macintosh. The Gavilan SC is the first portable computer
with the familiar flip form factor and the first to be marketed as a "laptop."
1985: Microsoft announces Windows, according to Encyclopedia Britannica. This was the company's
response to Apple's GUI. Commodore unveils the Amiga 1000, which features advanced audio and video
capabilities.
1985: The first dot-com domain name is registered on March 15, years before the World Wide Web
would mark the formal beginning of Internet history. The Symbolics Computer Company, a small
Massachusetts computer manufacturer, registers Symbolics.com. More than two years later, only 100 dotcoms had been registered.
1986: Compaq brings the Deskpro 386 to market. Its 32-bit architecture provides as speed comparable to
mainframes.
1990: Tim Berners-Lee, a researcher at CERN, the high-energy physics laboratory in Geneva, develops
HyperText Markup Language (HTML), giving rise to the World Wide Web.
1993: The Pentium microprocessor advances the use of graphics and music on PCs.
1994: PCs become gaming machines as "Command & Conquer," "Alone in the Dark 2," "Theme Park,"
"Magic Carpet," "Descent" and "Little Big Adventure" are among the games to hit the market.
1996: Sergey Brin and Larry Page develop the Google search engine at Stanford University.
1997: Microsoft invests $150 million in Apple, which was struggling at the time, ending Apple's court
case against Microsoft in which it alleged that Microsoft copied the "look and feel" of its operating
system.
1999: The term Wi-Fi becomes part of the computing language and users begin connecting to the Internet
without wires.
2001: Apple unveils the Mac OS X operating system, which provides protected memory architecture and
pre-emptive multi-tasking, among other benefits. Not to be outdone, Microsoft rolls out Windows XP,
which has a significantly redesigned GUI.
2003: The first 64-bit processor, AMD's Athlon 64, becomes available to the consumer market.
2004: Mozilla's Firefox 1.0 challenges Microsoft's Internet Explorer, the dominant Web browser.
Facebook, a social networking site, launches.
2005: YouTube, a video sharing service, is founded. Google acquires Android, a Linux-based mobile
phone operating system.
2006: Apple introduces the MacBook Pro, its first Intel-based, dual-core mobile computer, as well as an
Intel-based iMac. Nintendo's Wii game console hits the market.
2007: The iPhone brings many computer functions to the smartphone.
2009: Microsoft launches Windows 7, which offers the ability to pin applications to the taskbar and
advances in touch and handwriting recognition, among other features.
2010: Apple unveils the iPad, changing the way consumers view media and jumpstarting the dormant
tablet computer segment.
2011: Google releases the Chromebook, a laptop that runs the Google Chrome OS.
2012: Facebook gains 1 billion users on October 4.
2015: Apple releases the Apple Watch. Microsoft releases Windows 10.
2016: The first reprogrammable quantum computer was created. "Until now, there hasn't been any
quantum-computing platform that had the capability to program new algorithms into their system. They're
usually each tailored to attack a particular algorithm," said study lead author Shantanu Debnath, a
quantum physicist and optical engineer at the University of Maryland, College Park.
2017: The Defense Advanced Research Projects Agency (DARPA) is developing a new "Molecular
Informatics" program that uses molecules as computers. "Chemistry offers a rich set of properties that we
may be able to harness for rapid, scalable information storage and processing," Anne Fischer, program
manager in DARPA's Defense Sciences Office, said in a statement. "Millions of molecules exist, and each
molecule has a unique three-dimensional atomic structure as well as variables such as shape, size, or even
color. This richness provides a vast design space for exploring novel and multi-value ways to encode and
process data beyond the 0s and 1s of current logic-based, digital architectures." [Computers of the Future
May Be Minuscule Molecular Machines]
Additional reporting by Alina Bradford, Live Science contributor.
Additional resources
Fortune: A Look Back At 40 Years of Apple
The New Yorker: The First Windows
Computer History Museum: Timeline of Computer History
Parts of a computer with their functions
Here is a complete list of all the common computer hardware components and common peripherals that
get used with them.
1. The computer case
This is the part that holds all of the internal components to make up
the computer itself.
It is usually designed in such a manner to make fitting a
motherboard, wiring, and drives as easy as possible. Some are
designed so well that it is easy to make everything look tidy and
presentable too.
Cases come in all different shapes and sizes to accommodate
various types of computer components and to satisfy the needs of
the consumer.
Design elements can vary from being plain to extremely elaborate.
You can get a plain grey case or one that has colored lighting everywhere to make it looks spectacular.
Cases, like most things, vary in quality. You can get them made from cheap metals or from good quality
materials that provide you with a sturdy design.
List of computer case sizes (known as form factor):




Very small form factor: Supports Mini ITX motherboards
Small form factor: Supports micro ATX motherboards.
Standard form factor: Supports standard ATX motherboards.
Larger form factors: Supports ATX and XL-ATX motherboards.
2. Motherboard
The motherboard is the main board that is screwed directly
inside the computer case.
All other cards and everything else plugs directly into the
motherboard, hence its name.
The CPU, RAM, drives, power supply and more all get
connected to it.
Its function is to integrate all the components with each other so
they can communicate and operate together.
A good motherboard offers a wide amount of connectivity options. It also has the least amount of
bottlenecks as possible. This allows all the components to operate efficiently and to fulfill their maximum
potential as they were designed to do.
Obviously, as the physical size of a motherboard is reduced, it begins to limit connectivity options and
functionality.
Motherboards come in the following sizes:
Motherboard
Dimensions
Pico-ITX
3.9 inch x 2.9 inch | 100mm x 72mm
Nano-ITX
4.7 inch x 4.7 inch | 120mm x 120mm
Mini-ITX
6.7 inch x 6.7 inch | 170mm x 170mm
Micro-ATX
9.6 inch x 9.6 inch | 244mm x 244mm
Standard-ATX
12 inch x 9.6 inch | 305mm x 244mm
XL-ATX
EVGA: 13.5 inch x 10.3 inch | 343mm x 262mm
Gigabyte: 13.58 inch x 10.31 inch | 345mm x 262mm
Micro-Star: 13.6 inch x 10.4 inch | 345mm x 264mm
3. CPU: Central Processing Unit
The CPU is basically like the brain of a computer.
It processes all the information on a
computational level.
It takes information from the RAM and processes
it to perform the tasks required from the
computer.
It is usually seated in a socket that utilizes a lever
or a latch with a hinged plate with a cut out in the center to secure it onto the motherboard.
It has many copper pads underneath it for the contacts of the socket to push up against them to make
electrical contact.
There are other ways CPU’s can be attached to the motherboard.
Here are some common examples:




ZIF (Zero Insertion Force): Although this a more desirable socket, they are mostly found on
older computer motherboards. A lever-operated a mechanism to clamp the pins of the processor.
PGA (Pin Grid Array): It is also a ZIF socket but has a different pin pitch and contains a
different pin count.
LGA (Land Grid Array): More commonly found on motherboards today. A levered hinged
plate with a center cut out clamps down on the processor.
BGA (Ball Grid Array): The CPU is soldered directly onto the motherboard. This makes it a
non-user swappable part. It is susceptible to bad connectivity.
A processor generates a decent amount of heat, especially when it is working under high loads.
It will run even hotter when it is set to a higher clock speed in order to make it run faster. This is called
overclocking.
This is why a heatsink and fan assembly is required in order to draw the heat away from the processor and
distribute it to thin sheets or fins of metal for the fan to cool down.
There are so many different types of processors. The top manufacturers for computers are Intel, AMD,
and NVidia.
4. RAM: Random Access Memory
RAM is a data storage device that can provide fast
read and write access. RAM is also volatile which
means that it loses all the stored data the moment
power is lost.
The RAM keeps data ready for the CPU to process.
The speed of the RAM is a big contributor to the
overall speed of a computer.
It plugs directly into a long slot which has contacts on
either side of the slot.
It too has a clock speed, just like a processor. So, it
can also be overclocked to deliver increased performance beyond the intended specification.
Certain RAM modules are sold with a heat spreader. It helps dissipate the heat from the individual
memory IC’s, keeping them cooler.
RAM has evolved like any other component. RAM used on the motherboard often makes use of DDR
(Double Data Rate) SDRAM (Synchronous Dynamic Random Access Memory) type memory.
5. Graphics Card
A graphics card processes the data from the
motherboard and sends the appropriate
information to the monitor in order for it to be
displayed.
It can do so using an HDMI, DisplayPort, DVI,
or VGA connector.
A graphics card can also be referred to as a video
card or a display card.
It takes the burden of all the video processing from the main CPU. This gives a computer a big boost in
performance.
Because of the large processing requirements for a gaming graphics card, fans are almost a given.
A graphics card plugs into a PCI Express (Peripheral Component Interconnect Express) slot on the
motherboard. It is a serial expansion bus slot that is capable of a high amount of bandwidth, in two
directions.
A graphics card has a GPU (Graphics Processing Unit) which is the main component that requires
cooling.
A GPU is slower than a CPU, but it is designed to deal with mathematical operations required for video
rendering.
The amount of memory on the card varies depending on the manufacturer’s design.
Graphics cards use GDDR (Graphics Double Data Rate) SDRAM which is specially designed to be
optimized for graphics performance.
GDDR is built to handle a higher bandwidth compared to plain DDR ram.
6. Sound Card
Most of the time the sound chip built into the
motherboard is used for audio output.
But, if you are a sound enthusiast or prefer higher
detailed audio while playing a game, you might be
inclined to use a sound card.
Sound cards plug into a computer in multiple ways.
It can be through USB, PCI slot, or PCI Express x 1
slot.
A sound processing chip on the card does all of the
audio processing and is usually not a very powerful processor.
A sound card can offer a wide range of connectivity with various audio equipment.
A few examples could be optical audio, 1/4 inch jack, or RCA connectors.
7. Hard Drive
A hard drive is found in most computers. It’s usually a
mechanical drive that stores all the data.
Apart from storing data, it can also be used as a boot drive
in order to run the operating system from it.
An operating system is a software program that makes a
computer useable. Like Microsoft Windows for example.
The biggest vulnerability of a mechanical drive is the
physically fragile nature of it.
One bump the wrong way can destroy a whole drive.
A mechanical hard drive contains one or more platters that spin anywhere between 5200 to 10000 RPM
(revolutions per minute). The read and write heads are spaced only about 0.002 (51 micro M) of an inch
away from the platter.
This gives you an idea about the physical limitations regarding its fragile nature.
Small areas on the platter can be arranged to represent a 1 or a 0. It can be changed using the drive head to
magnetically alter the material to represent the correct value.
8. SSD: Solid State Drive
An SSD is also a type of hard drive, but it doesn’t have
any moving parts. It consists of a bank of flash
memory that can hold a reasonable amount of data.
While SSD’s are increasing in size all the time, they
aren’t cost-effective for storing large amounts of data.
A mechanical drive has a cheaper gigabyte to dollar
ratio.
However, the SSD is a high-performance drive. It’s
fast and cannot be as easily damaged by dropping it or taking a few knocks.
That’s why I always recommend SSD’s for portable type computers where possible. You can read more
about whether or not SSD’s are worth it in our other article.
9. PSU: Power Supply Unit
A power supply mounts inside the computer case. This
converts the AC mains supply from the wall socket and
supplies the correct DC voltages to all the components
inside the computer.
A computer power supply supplies the following voltages:
 +3.3v: This voltage is supplied to the motherboard.
 +5V: This voltage is supplied to the motherboard and

other internal components.
 +12V: This voltage is supplied to the motherboard and
other internal components.
-12V: This voltage is supplied to the motherboard.
You get different wattage ratings for power supplies. The higher the wattage, the higher the amount of
electrical current can be made available to parts that need it.
The higher you go in Watts, the more the power supply will be likely to cost.
A power supply also comes with its own cooling fan. This helps all the internal components to stay cool
when the power supply is subjected to bigger loads.
10. Monitor
A monitor is what you use to see a visual representation of the
graphics data sent from the graphics card of the computer.
There are various types of monitors on the market. The most
commonly used is a LED-backlit LCD monitor.
There are also a variety of different sizes with different aspect
ratios. The aspect ratio is simply the ratio between height and
width.
For example, a 16:9 aspect ratio monitor will have 16 parts
wide to 9 parts in height.
There are also curved monitors, but they are more expensive.
Monitors also have a fast response time in order to keep up with the high demands required to eliminate
delays with user input for gaming.
11. Keyboard
A keyboard is one of the ways to communicate with a
computer. By typing a key from the keyboard, it sends a
small portion of data to tell the computer which key was
pressed.
The computer can use this information in many ways. An
example could be a command or a character that can be
used in a document.
I talk about my personal favorite keyboard over here.
There are two main different types of keyboards. Mechanical and membrane types.
12. Mouse
A mouse allows the user to move a pointer displayed on
the monitor and experience a more intuitive interaction
with the computer.
These days mice have more buttons than the common
three.
The three main buttons, however, allows the user to
select, grab, scroll and access extra menus and options.
A computer mouse can be wired or wireless. The latter obviously requires batteries.
You can take a look at my favorite mouse right here.
Optical mice of today allow for very accurate precision and smooth movement.
Common external peripherals
Here are some common peripherals that get connected to a computer and extends its usefulness.
Printer
A printer can take an image sent by a computer and deliver it
onto a sheet of paper.
It does this by using the data from the computer and by either
using toner or ink, it deposits one of these in a controlled and
accurate manner to form the image.
Scanner
A scanner can take anything on a piece of paper and scan it to
produce a replicated digital image.
This is also very handy for saving physical photos that you
want to preserve.
Once the photo is stored digitally, it won’t decay as a physical
photo does over time.
Computer Speakers
Computer speakers can connect up to the sound card at the
rear of the computer.
Another way they can be connected is by a monitor that
already has built-in speakers.
Generally, the sound quality is poor from a monitor’ speakers.
That’s why most people buy a set of computer speakers to have on their computer desk.
You can even connect up a 7.1 surround speaker system to certain sound cards.
This can add a nicer experience when it comes to gaming, playing music, or watching a film