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And scientists.

For some reason european science was full of old school Mac users.

Much of the early part of the Human Genome Project was done using gel based DNA sequencing machines that were controlled by Classic Macs.

The rest of our shop was Solaris on SPARC/x86 and we had our own custom tool chain that crunched the data, but the sequencer itself was run by a Mac.

From 1999 or so forward the next generation of machines were Windows.