ptlib: PTLib (Portable Tools Library)
ptlib: 
ptlib: PTLib is a moderately large class library that has it's genesis many
ptlib: years ago as PWLib (Portable Windows Library), a method to product
ptlib: applications to run on both Microsoft Windows and Unix systems. It
ptlib: has also been ported to many other systems.
ptlib: 
ptlib: Since then the system has grown to include many classes that assist
ptlib: in writing complete multi-platform applications. So it became a
ptlib: Portable Tools Library and was renamed to PTLib.
ptlib: