Hardware and software planning and evaluation
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This document discusses computer hardware and the process of evaluating hardware. It defines hardware as the physical devices that make up a computer system, including internal components like the motherboard, hard drive, and RAM, as well as external components like monitors, keyboards, and printers. It then lists six main hardware components: the CPU, primary storage, secondary storage, input devices, output devices, and communication devices. Finally, it discusses important factors to consider when evaluating hardware, such as modularity, expandability, ergonomics, software availability, cost, performance, compatibility, and vendor.
Hardware and software planning and evaluation
- 3. HARDWARE CONSISTS OF THE PHYSICAL DEVICES ASSOCIATED WITH A COMPUTER SYSTEM.
- 4. COMPUTER HARDWARE- REFERS TO THE PHYSICAL PARTS OF A COMPUTER AND RELATED DEVICES. INTERNAL HARDWARE DEVICES INCLUDE MOTHERBOARDS, HARD DRIVES, AND RAM. EXTERNAL HARDWARE DEVICES INCLUDE MONITORS, KEYBOARDS, MICE, PRINTERS, AND SCANNERS.
- 5. SIX HARDWARE COMPONENTS 1 . C P U - C E N T R A L P R O C E S S I N G U N I T - T H E A C T U A L H A R D W A R E T H A T I N T E R P R E T S A N D E X E C U T E S T H E P R O G R A M ( S O F T W A R E ) I N S T R U C T I O N S A N D C O O R D I N A T E S H O W A L L T H E O T H E R H A R D W A R E D E V I C E S W O R K T O G E T H E R .
- 6. 2. PRIMARY STORAGE IS THE C O M P U T E R ’ S M A I N M E M O RY, W H I C H C O N S I S T S O F T H E R A N D O M A C C E S S M E M O RY ( R A M ) , C A C H E M E M O RY, A N D T H E R E A D - O N LY M E M O RY ( R O M ) T H AT I S D I R E C T LY A C C E S S I B L E TO T H E C P U .
- 7. 3 . S E C O N D A RY S TO R A G E C O N S I S T S O F E Q U I P M E N T D E S I G N E D TO S TO R E L A R G E V O L U M E S O F D ATA F O R L O N G - T E R M S TO R A G E . S E C O N D A RY S TO R A G E D E V I C E S A R E N O N V O L AT I L E A N D D O N O T L O S E T H E I R C O N T E N T S W H E N T H E C O M P U T E R I S T U R N E D O F F. S O M E S TO R A G E D E V I C E S , S U C H A S A
- 8. 4 . I N P U T D E V I C E I S E Q U I P M E N T U S E D T O C A P T U R E I N F O R M A T I O N A N D C O M M A N D S .
- 10. 6 . C O M M U N I C A T I O N D E V I C E I S E Q U I P M E N T U S E D T O S E N D I N F O R M A T I O N A N D R E C E I V E I T F R O M O N E L O C A T I O N T O A N O T H E R .
- 13. EVALUATING HARDWARE CAN BE A COMPLICATED PROCESS. FOR SCHOOL DISTRICTS WITH LARGE MAINFRAME COMPUTER SYSTEMS, ACQUIRING HARDWARE MEANS INVESTMENT OF MILLIONS OF DOLLAR FOR MANY YEARS IN A PARTICULAR VENDOR. IN THE PUBLIC SECTOR, ADMINISTRATORS WILL LIKELY USE COMPETITIVE BIDING PROCEDURES THAT MAY REQUIRE IDENTIFYING A FORMALIZED EVALUATION PROCEDURE TO PROSPECTIVE BIDDING. BACK
- 14. ARE VERY IMPORTANT FACTORS FOR LONG- RANGE PLANNING. MODULARITY, REFERS TO THE INTERCHANGEABILITY OF COMPONENTS OR PARTS OF A HARDWARE SYSTEM. EXPANDABILITY, IS THE ABILITY OF COMPUTER HARDWARE TO GROW OR EXPAND AS A NEW APPLICATIONS ARE DEVELOPED OR AS OLD APPLICATIONS BECOME LARGER. TECHNOLOGY IS CONSTANTLY EVOLVING. TO EXPAND NEWLY PURCHASED EQUIPMENT SHOULD NOT REFLECT OLD TECHNOLOGY BEING PHASED OUT. Back