What is Ad? A common abbreviation for advert

A common abbreviation for advert, which is in turn an abbreviation of , idvertisement. For no apparent reason, it has become common practice to use ad when referring to any kind of advertisement in an online context.

ActiveX A Microsoft-developed independent program which can be safely downloaded to a computer

A Microsoft-developed independent program which can be safely downloaded to a computer and immediately run without fear of viruses or other harm to the computer or its files, ActiveX makes it possible for web pages to include functions such as animations and calculators. Note, however, that a similar definition can be found for Java, ActiveX being Microsoft's version of a program with the same function.