CLASS - Client Access to Systems and Services

CLASS - Cooperative Library Agency for Systems and Services

CLASS - Custom Local - Area Signaling Services

CLC - Clear Carry Flag

CLD - Clear Direction Flag

CLG - Common Language Grammar

CLI - Clear Interrupt Flag

CLI - Client Library Interface

CLI - Compare Logical Immediate

CLI - Call Level Interface

CLI - Command -Line Interpreter

CLI - Command Line Interface

CLIB - C Library

CLID - Common Language Independent set of Database

CLID - Calling Line Identification

CLIST - Command List

CLK - Clock

CLK - Caps Lock Key

CLLM - Consolidated Link Layer Management

CLM - Compose Logical Under Mask

CLNP - Connection Less Network Protocol

CLNS - Connectionless Network Service

CLOS - Common Lisp Object System

CLP - Clipboard

CLP - Cell Less Priority