Acknowledgements

Several of the more elaborate computational functions in this version of DIPSO have been grafted on as a result of people exploiting the user interface, with their code eventually being adopted for the release version. The biggest single contribution is the ELF package, which was developed by Pete Storey (pjs@star.ucl.ac.uk). Pete also had a hand in NEBCONT, which uses code primarily written by Pat Harrington (U. of Maryland). Stephen Boyle (sjb@star.ucl.ac.uk) donated the Fourier, periodogram, and cross-correlation routines; the interstellar line profile code has a long and chequered history, but was first brought forth in the good old days of punched cards by Clive Davenhall. DIPSO's basic structure and command interface owes much to Dane Maslen. Other contributors include Jack Giddings, Des Middlemass, David Monk, and Starlink Management.