What changed in the version history of Open/Close CD?

Key updates to Open/Close CD over time:

• v1.20 (August 28, 2000) -- Added drive letter support for multiple CD-ROM drives, added "open" and "close" words instead of 0 or 1, enhanced error handling, and rewrote command-line parsing
• v1.13 (April 21, 1999) -- Corrected problem with "shareable" command with some CD-ROM drives
• v1.11 (December 16, 1998) -- Added close command and flexible argument ordering
• v1.01 (June 18, 1998) -- Added error checking for older CD-ROM devices
• v1.00 (May 8, 1998) -- Initial version