| .asp |
Active Server Page |
| .aspx |
Active Server Page Extended File |
| .asmx |
ASP.NET Web Service File |
| .atom |
Atom Syndication Format |
| .alx |
BlackBerry Application Loader XML File |
| .axd |
ASP.NET Web Handler File |
| .att |
Web Form Post Data File |
| .asax |
ASP.NET Server Application File |
| .a5w |
Alpha Five Webpage File |
| .adr |
Opera Bookmarks File |
| .ascx |
ASP.NET User Control File |
| .asa |
ASP Configuration File |
| .ap |
Active Page |
| .aro |
SteelArrow Web Application File |
| .asr |
ActionScript Remote Document |
| .ashx |
ASP.NET Web Handler File |
| .aex |
After Effects Plug-in |
| .awm |
AllWebMenus Project File |
| .a4p |
A4Desk Pro Project File |
| .an |
Adobe Edge Animate Project File |
| .appcache |
HTML5 Cache Manifest File |
| .bok |
TestGen Testbank File |
| .bml |
Bean Markup Language File |
| .btapp |
uTorrent App |