Used to & might still: astrobiology, complex systems, agile software development, community design & development, data mining, artificial life, genetic programming (software synthesis), molecular biology (combinatorial chemistry), philosophy of science, management consulting (futurism-nobody-listens-to), open access…

Then a long disruptive break as my wife & I spent a decade taking care of sick friends & relatives.

Now, mainly: sell books on eBay; scan printed works; public domain support