The Classic package fits the functionality of the previous versions of InterForm400. The Classic package includes PCL output on an unlimited number of output queues, ZPL output, PDF output and e-mailing.
If you already have purchased the full InterForm400 license prior to the 2004 versions (and have maintenance) then you will get a 2010 license code for the classic package. If you already have bought InterWord400 or additional SwiftView licenses then the 2010 code (and future license codes) will of course also include that.