ISM - Integrated System Management

ISMF - Interactive Storage Management Facility

ISMN - Information System in Mobile Networks

ISO - International Standards Organization

ISO/OSI-M - International Organization for Standardization / Open System Interconnection Model

ISOC - Internet Society

ISP - Internet Service Provider

ISP - International Standardized Profiles

ISP - Interrupt Stack Pointer

ISP - Interrupt Status Port

ISPA - Internet Service Providers Association

ISPF - Interactive System Programming Facility

ISR - Information Storage and Retrieval

ISR - Interrupt Status Register

ISR - Interrupt Service Routine

ISS - Integrated Silicon System

ISSI - Inter - Switching System Interface

ISSLL - Integrated Services over Specific Link Layers

ISSN - International Standard Serial Number

ISSS - Initial Sector Suit System

ISV - Independent Software Vendors

IT - Information Technology

ITAA - Information Technology Association of America

ITB - Intermediate Text Block

ITB - Information Technology Branch