If you find PARC interesting, and especially if you're interested in symbolic computation, I can highly recommend digging as deep as you can possibly stomach into the FGCS:
As a public research initiative, pretty much everything was published when the initiative was completed. PIMs are absolute engineering marvels. The ICOT had command of an army of the absolute best talent in the entire country, and unified them towards a goal of pure exploratory research with no market pressure, with all the excesses of 1980s Japan.
https://www.airc.aist.go.jp/aitec-icot/ICOT/HomePage.html
As a public research initiative, pretty much everything was published when the initiative was completed. PIMs are absolute engineering marvels. The ICOT had command of an army of the absolute best talent in the entire country, and unified them towards a goal of pure exploratory research with no market pressure, with all the excesses of 1980s Japan.