Computer Components • Hardware-physical devices of a computer • Input Devices – Keyboard – Mouse • Peripheral Devices- Attached devices – Printer – Scanner Computer Components • Output Devices – Monitor – Speakers Computer Concepts • Base unit- contains the motherboard • Motherboard-Main circuit board that contains several components: – Expansion board- circuit boards that connect to the motherboard to add functionality to the computer. Ex. Sound cards and video adapter – CPU(central processing unit)- processes data and controls the flow of data between the computer’s other units. – Bus- set of circuits that connect the CPU to other components. Mobile Computing • Notebook computer- portable lightweight computer with a CPU, memory, and hard disk space that is compared to a typical desktop computer. • Tablet PC- computer designed similar to a pad of paper and a pencil. Users simply “write” on the screen with a device called a stylus. Mobile Computing • Handheld computer- are palm-sized and contain applications for storing contact information, schedules, lists, and games. • Smartphone- cellular phones that are able to send and receive e-mail messages and access the internet. Some smartphones have digital cameras, mp3 players, and color display capabilities. • Wearable computer- vary greatly in size and application. Networks Network- combination of hardware and software that allows computers to exchange data and share software and devices, such as printers. LAN(local area network)- network used to connect devices within a small area such as a building or a campus. WAN(wide area network)- one widespread network or a number of LANs connected together. Networks • Network operating system- allow users and devices to communicate over the network. • Network Architecture- includes the type of computers on the network and determines how network resources are handled. Files and Folders • File- A collection of related data stored on a lasting medium, such as a hard drive disk. • Folders- used to organize commonly related files. Intranets, Extranets, and the Internet • Intranet- network that is used by a single organization, such as a corporation or school , and is only accessible by authorized users. • Extranet- extends an intranet by providing various levels of accessibility to authorized members of the public. • Internet- a world-wide network of computers that is not controlled by any one organization. Telecommunications • Telecommunication- the transmitting and receiving of data. • Conventional Modem- uses standard telephone lines to convert analog signals to digital data. • DSL- (Digital Subscriber Line) Modem- uses standard telephone lines with data transmission up to 640 Kbps. Cable Modem • Cable Modem- transmits data through a coaxial cable television network. • Leased/Dedicated lines- are used by many businesses and schools for internet access. Allows for a permanent connection to the internet that is always active. • ISDN(Integrated Services Digital Network)digital telephone network provided by a local phone company. Internet Services • Personal websites- created by individuals for the purpose of displaying information about the individual’s hobbies, pets, family members, and so forth. • Commercial websites- include corporate presence websites, which are created by companies and organizations for the purpose of displaying information about their products or services. Internet Services • Informational websites- created for the purpose of displaying actual information about a particular topic and are often created by educational institutions, governments, and organizations. • Media websites- are online newspapers and periodicals that are created by companies for the purpose of informing readers about current events and issues. Internet Services • Portal websites- created by businesses for the purpose of creating a starting point for people to enter the Web.