Arnold Trembley's Home Page


These pages were last updated Saturday, June 10th, 2017.

I have recently retired after turning 65 and I'm enjoying more leisure time for taking Adult Continuing Education Classes, playing Bridge, and learning to play guitar and ukulele.

For the last couple of years I have been working with GnuCOBOL (formerly OpenCOBOL), which appears to be the free COBOL compiler for Windows that I have been looking for. Please see the link to "My GnuCOBOL/OpenCOBOL Links".

For anyone who might be interested, I have a version of the Unix CAL.EXE calendar utility, reimplemented in PowerBasic as PBCAL.EXE for 32-bit Windows XP or 64-bit Windows 7.
PBCAL.ZIP for Windows XP and Windows 7

As of Sun-21-Feb-2010, I have moved my pages to, since my previous provider no longer supports free personal web pages. I can also be found on LinkedIn and Facebook.

In 2007 I replaced Netscape with Mozilla Firefox and Thunderbird as my default browser and mail/news reader. And I've been trying to play the guitar again, but it is difficult to find enough time to practice. A good friend gave me a Fender Squire Stratocaster as an incentive. Recently, I've been having some fun playing Ukulele.

Occasionally I receive emails from programmers in India with COBOL questions, which is very gratifying to me. I hope the comments I provide to other working programmers are helpful.

For original work, I recommend my page on "COBOL Runtime Efficiency", which includes links to some additional performance anecdotes (including Leif Svalgaard's excellent article on Sorting Algorithms). The Programming Resources page has been updated to include links to GnuCOBOL/OpenCOBOL. There is also a sample COBOL program for converting IBM OS/VS COBOL source code to IBM VS/COBOL II source code.

You can read about distributed denial of service attacks at the Gibson Research Corporation website. I recommend this site to anyone with concerns about Internet privacy and security.

Please feel free to contact me at the following address: