About z/XDC - The z/XDC Story:

The z/XDC story begins with its author, David B. Cole, owner and founder of ColeSoft Marketing. Dave has nearly 40 years of programming experience in MVS (and predecessor) systems with concentration in the Assembler and MVS internals. During his career, Dave has had the opportunity to work on nearly every part of the MVS operating system and has earned a reputation as an authority in this field.

It was during his employment at Yale University that Dave first conceived of what z/XDC is today - a powerful development tool for Assembler Language programmers. The product's design and coding began circa 1978. The first predecessors to XDC were simple trapping and zapping utilities that evolved along with Dave's career in systems programming. Early on, DBC (the first marketed version of XDC) became available to selected users by word of mouth. Several prominent software development houses were among the product's early customers. It was the needs of these sophisticated users that helped drive the evolution of the product from its inception.

In 1988, Dave bought out the rights to XDC from Yale and formally started Cole Software^®, now called ColeSoft Marketing. Thus, the product actually pre-dates the company that supports it today.

z/XDC's user community is small, but it is highly sophisticated and represents some of the best minds in the software industry. Our users are among the industry's foremost software development houses and Fortune 500 companies.

z/XDC's greatest strength is the continuous refinement it derives primarily from a single, dedicated programmer. The product's users also have a great deal to do with z/XDC's future direction. Dave built z/XDC on simple precepts: target a specific user group, continue to evolve to meet the needs of the users, and provide excellent support.

Dave loves to code, and it shows! He truly believes that the existence of z/XDC has helped contribute to the continued usefulness of the Assembler Language as a modern program development tool. Just as MVS/SP has evolved over the years to become z/OS, so has ColeSoft Marketing's product evolved from the original DBC to today's z/XDC.

We hope you will consider joining our small group of satisfied, hard-working users.