AVID have a range of professional software applications for audio & music production, music notation and video. Pro Tools is the industry standard DAW for recording, editing and mixing for music and post-production projects. Pro Tools can be purchased as a perpetual or subscription based license. Various packages are available, that can include tech support, upgrades and bonus plug-ins. There are two main versions - the standard which is simply called Pro Tools, and Pro Tools HD. Please visit the AVID website for a detailed Pro Tools feature comparison. Also available from AVID is Sibelius, which is a full-featured music notation program, and Media Composer - a professional video editing software application. Sibelius and Media Composer can also be purchased via subscription or a perpetual license, and there are academic versions available for all AVID software products, except Pro Tools HD.