FIRST TERM SCHEME OF WORK 2014/2015
SS 1 COMPUTER STUDIES/ICT
Wk
1
2
3
4
5
6
7
8
9
10
11
12
TOPIC(S)
Overview of computer system
Data and Information
Computing Device I (pre computer age to 19th century)
Computing Device I (pre computer age 19th century)
Computing Devices II (20th century to date)
Input Devices
Input Devices
Output Devices
Output Devices
Revision
Examination
Compilation of Results
WEEK 1
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OVERVIEW OF COMPUTER SYSTEM
DEFINITION OF COMPUTER
A computer is an electronic device that accepts data, processes data, stores data and produces the
results in a meaningful information.
Also, computer is a programmable machine that receives input, stores and manipulates data and
provides output in a useful format.
CONSTITUENTS OF A COMPUTER
The computer system comprises two parts, namely:
1.
Computer hardware
2.
Computer software
COMPUTER HARDWARE
This refers to the physical parts of a computer that can be touched, seen and handled. Computer
hardware can be divided into two, namely the system unit and peripherals.
SYSTEM UNIT
This is the combination of the main parts which include the central processing unit, memory
modules and banks, chipsets, etc.
COMPUTER PERIPHERALS
Computer peripherals are hardware that are not part of the system unit. They are
add-on hardware to the computer to expand its capabilities or improve its
performance.
The computer hardware components are:
keyboard, mouse, scanner, printer, monitor, plotter, earpiece, speaker, etc
COMPUTER SOFTWARE
Computer software can not be seen or touched or handled. The computer software
can be divided into system software and application software.
Examples of system software include, operating systems, compilers, interpreters,
assemblers, input/output routines, diagnostic routines, job control languages,
database management systems and other important utilities.
APPLICATION SOFTWARE
Examples of application software include Microsoft Word, Adobe PageMaker,
Corel draw, Print Artist, Cool 3D,etc.
CHARACTERISTICS OF THE COMPUTER
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
SPEED: It is fast in operation
ARITHMETIC AND LOGICAL OPERATIONS: It performs the
addition, subtraction, multiplication and division on the numeric
data.
ACCURACY: Its processed out result is very accurate and reliable.
RELIABILITY: Computer can perform very complicated
calculations without creating any problem and produces reliable
results.
STORAGE: It has internal storage (memory) as well as external or
secondary storage.
RETRIEVING DATA AND PROGRAMS: The data and program
stored on the storage media can be retrieved very quickly for
further processing.
AUTOMATION: It controls automatically different devices
attached to it.
VERSATILITY (FLEXIBILITY): It performs different kind of
tasks simultaneously.
CONSISTENCY: Computer can repeat actions consistently without
loosing its concentration.
PRECISION: Computer performs operations accurately and
precisely and also you can keep the accuracy and precision up to
the level you desire.
ASSIGNMENT
1. Define a computer system
2. Differentiate between data and information
3. List two (2) examples each of data and information
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THANK YOU