265) Recycle Bin

In computing, a recycle bin, or trash, is temporary storage for files that have been deleted in a file manager by the user, but not yet permanently erased from the physical media.

Source: http://en.wikipedia.org/wiki/Recycle_bin_(computing)

25) problem solving

A computer-assisted instruction technique in which students are required to apply known information to new settings. It demands logical thinking and the ability to follow directions carefully.
Source: http://www.personal.psu.edu/bxb11/CBTGuide/Append/Gloss.htm

24) power spikes

In electrical engineering, spikes are fast, short duration electrical transients in voltage (voltage spikes), current (current spike), or transferred energy (energy spikes) in an electrical circuit.

Source: http://en.wikipedia.org/wiki/Power_spikes

23) ping

Ping is a computer network administration utility used to test whether a particular host is reachable across an Internet Protocol (IP) network and to measure the round-trip time for packets sent from the local host to a destination computer, including the local host's own interfaces.
Source: http://en.wikipedia.org/wiki/Ping

22) patch

a short set of commands to correct a bug in a computer program. 

Source: wordnetweb.princeton.edu/perl/webwn

21) operating systems

software that controls the execution of computer programs and may provide various services. Some examples of operating systems are Mac OSX Snow Leopard 10.6, Windows XP, Windows 7, and Linux.

20) network license

allows system administrators to install licenses on more than one computer per process, enabling users to have access both in their offices and on the production line.