| A | B |
|---|
| Data Compression | encoding data so it takes up less space |
| Anti-virus Protection | resident software that searchs for known virus |
| Disk Checker | check & mark disk for errors |
| File Encryption | encrypt data so only readable by autorised people |
| Multi-tasking | run more than one app at same time |
| Multi-tasking addittional resourse | increase RAM, HDD, CPU |
| multi-programming platform | OS can perform more than one task at a time |
| Kernel | Abstracts Hardware & gives IO service |
| Input/Output System | consistent file access & hardware access |
| Multi-user OS | time, hardware & software resources shared |
| Archive Bit | File edited since last backup |
| Read Only Bit | File cannot be edited, deleted or written to disk |
| EEPROM | erased by exposing it to an electrical charge |
| EDO RAM | mem speeds up access time by pre-charging |
| PROM | burns tailor made code into chip |
| Polling | continuously check devices for status |
| Interrupts | signal from device that needs attention from CPU |
| GUI | operated by mouse, pointers, graphics for ease of use |
| CLI | commands typed, not easy to use |
| Cache | Memory beside CPU for fast access of instruction |
| data protection | Protects information on clients held on computer |
| consumer protection | act deals with supplying goods from online orders |
| computer misuse | act deals with data illegally/ copy software |
| health and safety at work | Act deals with safe environment, duty of care |
| disability discrimination | Act deals with reasonable adjustment for disabled employee |
| protection of the environment | Act deals with disposal of old equipment |
| Local Variables | data available in small section of code |
| Global Variables | data available in full program |
| Stepwise refinement | Break problem down into smaller parts |
| meaninful | Names given to variables should be |
| Comments | text that helps people understand the code |
| Boundary Data | Data at outer limits of normal |
| Extreme Data | Data outwith any normal values |
| Normal Data | Data within expected range |
