BUS 237 Chapter Notes - Chapter 4: Usb, Central Processing Unit, Hertz

• School: Simon Fraser University
• Department: Business Administration
• Course: BUS 237
• Professor: Kamal Masri

Document Summary

All computers have four basic components: input, processing, output, and storage: input: hardware that attach to a computer. Keyboards, touch screen, bar code scanners: processing devices: central processing unit (cpu) Selects instructions, processes them, performs arithmetic and logical comparisons, stores results of operation in memory. Measure in hertz (hz) or cycles and counted in gigahertz (ghz) billion cycles per second: random access memory (ram): computer"s main memory. Cpu reads data and instructions from ram stores the results of its computations in the main memory: output: displays the results of the computer"s processing. Video displays, printers, audio speakers, overhead projectors: storage hardware: saves data and programs. Mostly use flash or solid state device memory (ssd) memory, such as. Usb and ssd faster in certain apps but can fail with no prior indication, and cannot recover loss memory: special function devices: added to augment each of its components (ex. Computers represent data using binary digits, called bits (0,1)