Computer Basics

What is a Computer? “A computer is an electronic device, operating under the control of instructions stored in its own memory, than can accept data (input), process the data according to specified rules (process), produce results (output), and store the results (storage) for future use” MS Office 2007, Shelly Cashman“A computer is an electronic device, operating under the control of instructions stored in its own memory, than can accept data (input), process the data according to specified rules (process), produce results (output), and store the results (storage) for future use” MS Office 2007, Shelly Cashman OR A machine that uses instructions to do jobs.A machine that uses instructions to do jobs.

What is a computer? An electronic device that inputs, processes and stores information

Functions of a Computer Input: Entering data, graphics, etc. Process: What the CPU does, including calculations and drawing images for output Storage: Saved files (remember, they must have a NAME) Output: Includes what you see on the screen and what comes out through a printer, speakers, etc.

Computers include … HardwareHardware SoftwareSoftware –Application software –System software MemoryMemory StorageStorage

Hardware Is anything you can touchIs anything you can touch –Computer –Monitor –Mouse and Keyboard –Microphone and speakers –Scanner

Software: The programs, or tools, that allow you to use a computer.The programs, or tools, that allow you to use a computer. –Microsoft Word –Browsers (Internet Explorer, Chrome) –Adobe Photoshop Computers must have system software, or an operating systemComputers must have system software, or an operating system –Windows (PC based from Microsoft) –Linux (PC based Open Source) –Snow Leopard (Apple)

Memory Ram –Where open files sit until saved –Stored physical chips Video Memory –Allows intense graphics –CPU uses to draw images on the screen

Storage Saved files Internal –Hard disk drive External –Hard disk drive –Flash drive –CD/DVD Network drives

Peripheral Devices Expand the capabilities of the computer

2 main types of peripheral devices Input Devices Output Devices

Path of Information Through a Computer Input Device RAM CPU Output Device

Computer Basics