Survey of PKZIP versions for MS-DOS

I wanted to know exactly what versions of the old PKZIP compression software were publicly released for MS-DOS, and some basic characteristics about them, particularly what compression methods they used when compressing files. Sure, Wikipedia has a list, but it wasn't quite what I wanted, and it omitted at least one version I was pretty …

Will the real PKZ110.EXE please stand up?

I've been researching the version history of PKZIP, the once-popular compression software that gave us the still-popular ZIP file format. There are two important MS-DOS versions of it: v1.10, released in March 1990, which was the latest official version for more than 2.5 years, until v2.04c(?) was released in December 1992.v2.04g, released February 1993, which …

I could care less about your word crimes

I always assumed that pretty much everyone knew that the phrase "I could care less" doesn't make literal sense. I assumed it was simply an unfortunate shortened form of "I couldn't care less". I think it's popular because it has better cadence. It might be helped along by the likely element of sarcasm in it. …

Survey of PackBits-like RLE compression schemes

This post is a survey of some run-length encoding (RLE) data compression formats, most of which are used for bitmapped graphics. One such format is PackBits. It's sort of the granddaddy of them, or the canonical example of such a format. Sometimes, formats similar to it are said to be "PackBits-like", though the term doesn't …

Daylight Saving Time

Public opinion seems to be turning against Daylight Saving Time (DST), despite the fact that most of our clocks now change automatically, and despite the fact that most people don't even seem to have a clear understanding of what DST does, and what its purpose is. I'm not necessarily the biggest proponent of DST, but …

Analyzing some Windows Write files

Write is the word processing program that came with Microsoft Windows 3.x (and earlier versions of Windows, but it's 3.x that I'm concerned with here). Many thousands of free and shareware programs were written for Windows 3.x, and a lot of them include some documentation in Write's WRI file format. Objectively, most of them should …

The 2019 TLS certificate serial number mess

Remember the Great TLS Certificate Serial Number Brouhaha of March, 2019? Millions of website certificates have been mis-issued! Everything is insecure! The sky is falling! Revoke and replace, ASAP! I barely do, but I remember thinking it was a really stupid overreaction. Now I've gone back and reviewed what happened, and I'll try to explain …