This page should keep you entertained for a while: http://metacalculus.com/prose.html http://metacalculus.com/prose.html It links to several manuals (most lik

This page should keep you entertained for a while: http://metacalculus.com/prose.html http://metacalculus.com/prose.html It links to several manuals (most likely including the one you read) and has links to papers about PROSE and it's predecessor, SLANG.