What is add-on? - Definition from WhatIs.com
Part of the Peripherals glossary:

An add-on is either a hardware unit that can be added to a computer to increase its capabilities or a program utility that enhances a primary program. Less frequently, some manufacturers and software developers use the term add-in . Examples of add-ons for a computer include card s for sound, graphics acceleration, modem capability, and memory. Software add-ons are common for games, word processors, and accounting programs.

The Microsoft Style Guide suggests using add-on for hardware only and add-in for software utilities. Industry-wide, however, this guideline does not seem to be widely followed.

A similar term is plug-in , a term originated by Netscape for application programs that can be activated within a Netscape Web browser window.

This was last updated in April 2005
Contributor(s): Keri Akin
Posted by: Margaret Rouse

Related Terms

Definitions

  • 3D mouse

    - A 3D mouse is a pointing and control device specialized for movement in virtual 3D (three-dimensional) environments. 3D mouse devices have used a number of different means to control 3D movement a... (WhatIs.com)

  • geo-fencing (geofencing)

    - Geo-fencing is a feature in a software program that uses the global positioning system (GPS) or radio frequency identification (RFID) to define geographical boundaries. A geofence is a virtual barr... (WhatIs.com)

  • SCSI (Small Computer System Interface)

    - Definition: Learn what the SCSI (Small Computer System Interface) is, what part it played in the history of personal computing and how it is used today. (SearchStorage.com)

Glossaries

  • Peripherals

    - Terms related to peripheral devices including definitions about keyboards or mice and words and phrases about printers, monitors, digital cameras and scanners.

  • Internet applications

    - This WhatIs.com glossary contains terms related to Internet applications, including definitions about Software as a Service (SaaS) delivery models and words and phrases about web sites, e-commerce ...

Tech TalkComment

Share
Comments

    Results

    Contribute to the conversation

    All fields are required. Comments will appear at the bottom of the article.