1. A 32-bit Windows program may access more than 640K.
Some memory is used by 32-bit Windows, some by system software, and some by other active applications. You should be able to run programs substantially larger than you can under MS-DOS, but establishing exact memory availability is difficult due to the highly dynamic nature of 32-bit Windows. The ACUCOBOL-GT runtime for 32-bit Windows is designed to handle memory management issues for you automatically.