Bob Eager writes:

On Sat, 01 Jun 2019 20:11:12 -0700, Yeechang Lee wrote:

Bob Eager wrote:
The server that drives them is running FreeBSD and CUPS.

Is CUPS, given that it is open source, immune to the Windows problem of
newer OS versions no longer supporting older printers?

Well, it's running a 1993 LaserJet or two.

As long as you have a PPD file..

In some cases, no: CUPS removed the SCSI library, so that would need to
be compiled separately if you want to use printers through an Adaptec
card or some other SCSI interface. At least that is my understanding
(testing an old ALPS with SCSI interface).
--
NNTP on Emacs 25.2 from Windows 7