If your looking for a faster better way to write professional database systems. We think you have found it in TAS Professional Powered by CAS. TAS Professional is designed to be a complete application development tool for DOS systems. It provides application building tools for the programmer new to application development, as well as the seasoned developer demanding professional quality development tools designed to work together from the beginning. These powerful utilities include: Data Dictionary Manager Database Maintenance Programs Form Editor Report Editor Source Code Editor Runtime Compiler TAS Professional 5 includes over 150 commands, each with many options, and over 230 functions that can be used in expressions. Many of the TAS Professional 5 commands can be compared to macro functions found in other high level languages. In other words, a single TAS Professional 5 command can often replace several entire lines in other languages. Add to this the ability to create User Defined Commands (UDCs) and User Defined Functions (UDFs), and you now have a very powerful development tool. Also a 16bit windows runtime is avalible that can run TAS PRO 5 in Windows. What TAS Professional 5 isn't? You're not going to write an operating system with TAS Professional. It isn't meant to replace programs like C++ or Delphi©. It was designed to give you the capabilities to easily and quickly develop general purpose business/financial programs using DOS We also have TAS Professioanl 6 for writing full 32bit windows database programs using both Btrieve(Pervaisive) or Codebase(Dbase).