To get X11 from MIT, send a letter and a check to MIT Software Center Technology Licensing Office Room E32-300 77 Massachusetts Avenue Cambridge, Massachusetts, 02139 The letter should specify what you want (tape, manuals, books). The rates as of Nov. 1988 are manuals + book tapes + manuals + book North America $125 $400 Everywhere Else $175 $500 You can also call the Software Center at (617) 253-6966. Alternatively, you can ftp the software from zap.mit.edu (east coast) or decwrl.dec.com (west coast).