Taken from the Apprentice32 Homepage, where you can download the latest version of the Apprentice software.

Apprentice 32
System Requirements
IBM 386/33MHZ 8MB RAM
Microsoft Windows 95 or Windows 3.x with Win32S
AOL Users Require:
AOLV3.0, or AOL95

Apprentice 32 is a freeware program written by Michael Allen based on Apprentice 1.0x by Tan Thor Jen, that allows two players to play Magic: The Gathering over the Modem/Internet. Apprentice 32 1.2 currently runs on Windows Win95 or 3.x with Win32S V 1.30 upgrade installed. Internet functions require a 32 bit communications dialup and a slip/ppp internet connection.

Apprentice does not actually play Magic for you in any way, it merely provides a virtual gaming table that players can see and play with M:TG cards with each other. Apprentice manages players Magic decks on both sides, shuffles, and deals you your cards. It keeps track of the cards in your hand, your graveyard, in your library, and the table. It also keeps track of lifepoints, counters, current turns and phases, and number of cards left in players libraries. It essentially allows you to play Magic without needing a single physical M:TG card. The game does not however understand how to play Magic. Understanding of the rules is required. Apprentice is merely a tool for playing Magic with a remote opponent.