Avast

                                                

Avast! (styled avast!) is - both freeware and payable - antivirus computer program with user interface that includes 41 languages, available to Microsoft Windows, Mac OS X and Linux users. The name Avast is an acronym of "Anti-Virus – Advanced Set".[3] The official, and current logo of Avast! is a white orb with the letter 'a' on it and an orange circle around it, sticking out to four directions. Its developer, AVAST Software a.s. (formerly known as ALWIL Software a.s.), has headquartered in Prague, Czech Republic, with offices in Linz, Austria; Friedrichshafen, Germany; and San Mateo, California.[4]