| A | B |
| Antivirus Program | A computer program that detects viruses and repairs files |
| Bomb | A destructive computer code or virus designed to activate at a specific time |
| Commercial | The type software whose copyright is owned by the author or software publisher |
| Copyright | Protection giving the owner the exclusive right to reproduce or distribute copies of his/her own work |
| Encryption | The process of converting readable data into unreadable characters to prevent unauthorized access |
| Ethics | The moral guidelines that govern the use of computers and information systems |
| Freeware | Computer software that is given away free of charge, but whose author still retains all rights |
| Hacker | A person who secretely gains access to computers and files without permission |
| Hoax | A computer program intended to scare users into thinking they have a virus |
| Password | A safeguard for access to a computer or computer program |
| Phage | A computer program that modifies other programs, operating systems, databases |
| Piracy | The illegal copying and distribution of software |
| PublicDomain | Computer software that is not copyrighted and is free to copy and distrubite |
| Shareware | Copyrighted software that is distributed free of charge on a trial basis with payment by the honor system |
| TrojanHorse | A virus that is disguised as a useful piece of software |
| Virus | A computer program designed to cause damage to computer files |
| Worm | A destructive computer program that bores its way through a computer's files or through a computer' network |