A function that performs a computation on a set of values rather than on a single value. For example, finding the average or mean of a list of numbers is an aggregate function.
All database management and spreadsheet systems support a set of aggregate functions that can operate on a set of selected records or cells.
- air cooling
Air cooling is a standard method of system cooling used to method of dissipate heat. The object being cooled will have a flow of air moving over its surface. Most air cooling systems use a combination of fans and heat sinks, which exchanges heat with air.
- air gap
In networks, air gap is a type of security where the network is secured by keeping it separate from other local networks and the Internet. While this provides security, it also limits access to the network by clients.
The actual timer subscribers spend talking on their cellular phones. Many cell phone plans are based on the number of airtime minutes that can be used each month. Pay-As-You-Go plans, for example, allows cellphone owners to pay in advance for talk time, and add add more airtime as needed, by day, week or month.
- alert box
(n.) A small box that appears on the display screen to give you information or to warn you about a potentially damaging operation. For example, it might warn you that the system is deleting one or more files. Unlike dialog boxes, alert boxes do not require any user input. However, you need to acknowledge the […]
A function of many Internet search engines that lets users specify keywords, phrases or tags pertaining to any topic that you would like to be notified of when new search results are available. Most alerts are delivered by e-mail or by RSS feed. Users can set alerts matching their own industry or their name or […]