Since abctab2ps is built upon abc2ps, it owes a lot to Michael Methfessel, the author of abc2ps. Moreover, significant parts of this user's guide have been copied from the Readmes of the abc2ps distribution. The current version of abc2ps is available from
Jean F. Moine's abcm2ps, which can handle more than one voice per stave, and the GUI-Editor tclabc, is available from
The abc language was originally invented by Chris Walshaw. On his abc home page
http://abcnotation.org.uk/you can find links to the official abc standard definition and to a wide variety of abc related software. Beware however that abctab2ps deviates considerably from the abc standard, because the standard does not support tablature at all.