Apple also included a Dashboard Widget for accessing the Dictionary application. In applications which support "Services", there is an option in the application menu,which brings up the Dictionary application and displays the definition of a selected word.

Malware
Software that runs computer processes that either unexpected or unauthorised but are always harmful. The term "malware"generally covers viruses, worms and Trojan horses.

Backdoor
Term for an app or service that permits remote access to an infected computer. It opens a backdoor to circumvent other security mechanisms.

Phishing
A method of stealing personal data via an authentic-looking e-mail which appears to come from a real company or institution -- to trick the recipient into sending vital banking or login information etc.

Trojan
Covert infiltration by malware or malicious software under the guise of a useful program.

Virus
A software with the ability to self-replicate and attach itself to other executable programs. May or may not be harmful. Depletes resources.

Worm
Autonomous program or constellation of programs that distributes fully functional whole or partial copies of itself to other computers.

Grayware
All applications that cause annoying and possibly undesirable or unforeseen behaviour in the way programs

Hacking Tools
Programs that render a computer or network more vulnerable to attack or use simulated hacking to test the vulnerability of all accessible components.

RATs
Remote Access Tools enable remote access to an infected computer, thus permitting outside administration or manipulation. Not malicious, but egitimate.

Spyware
Software that monitors and collects a user's data and eventually transmits it to a company for vanous purposes.