| Acronym | Meaning |
 | ADPCM | Adaptive Differential Pulse Code Modulation |
 | MCGA | Multi-Color Graphics Array |
 | MTA | Media Terminal Adapter |
 | OSF | Open Software Foundation |
 | AMPS | Advanced Mobile Phone System |
 | HAL | Hardware Abstraction Layer |
 | VDSL | Very High Bit Rate DSL |
 | DAO | Disk At Once |
 | CERT | The CERT Coordination Center |
 | PUP | Potentially Unwanted Program |