I participated in an internship in the summer of 2007. One of the things I found particularly interesting was gsearch. At the time, there were search engines for source code, but I was not aware of any that supported regular expressions. My internship host encouraged me by saying, “Try digging through repositories and look for the source code.”

What kind of hardware do we need to run those models?

And his big brother APC https://en.wikipedia.org/wiki/APC_series

NEC version of Alto: PC-100 https://en.wikipedia.org/wiki/NEC_PC-100

And their competitor FM-Towns https://en.wikipedia.org/wiki/FM_Towns

These are used x86 CPU.

This remind me about realcsh which is same concept. https://manpages.ubuntu.com/manpages/trusty/man1/realcsh.c.1... The package provides realksh which provide shell inside kernel. https://manpages.ubuntu.com/manpages/trusty/man8/realksh.c.8...

Yes, I use feedly for many blogs.

I also have many scripts that scrape web page and generate RSS.