The Applications area is the part of the IETF that is supposed to deal with applications; that is, things that are not security (part of the security area), nor networks (most of the other areas), but rather things that use the networks and security services to provide things of benefit to the end-user.
Things that have to do with how things operate are often left to the Operations and Management area; things that have to do with multicasting and interactive multimedia are in the Transport area; things that have to do with defining how people would like things done usually gravitate towards the User Services area; and most efforts that involve privacy or security are handled in the Security area. A few activities that would fall into these categories are jointly managed between Applications and those other areas.
Not even all things that are left are best done in the Apps area of the IETF; however, things that work on the Internet and need to specify open protocols have tended to gravitate towards the IETF, and thence to the Applications area.
Many procedures mention contacting the Area Directors. Both of them are people with full-time day jobs in addition to their IETF work, and an extremely heavy E-mail load. Therefore, don't be surprised if you don't get a reply back within a few hours!
Good guidelines for contacting us include:
Anyway, the two of us are:
Welcome to the Apps area!
Ned Freed <ned.freed+app@mrochek.com>