TPUG is noted for its ties with Commodore Canada, its extensive and widely distributed software library, and its association with prominent computing pioneers such as Jim Butterfield, Brad Templeton, Karl Hildon, and Steve Punter.

[1][2] At the urging of local author and programmer Jim Butterfield, Duggan organized his own PET group—then known as CLUB 2001—and advertised it by word of mouth.

Attendance at subsequent meetings grew rapidly, leading Duggan to shift them to ever-larger venues—first to the Ontario Science Centre and later to a theatre at Sheridan College.

[1][4] When Duggan was unexpectedly transferred by his employer to Florida in 1980, he nominated a board of directors to replace him, and TPUG was transformed from a privately run enterprise into a members' club.

Disks and tapes were distributed by mail to a network of associated Commodore user groups across North America and around the world.

[8][20] In its early decades, the club kept in touch with members and associates around the world through its dial-up bulletin board system, which was programmed and operated by Steve Punter and Sylvia Gallus.

[8] Though membership has dwindled, TPUG continues to hold monthly meetings where 12 to 15 attending members trade software, share hacking tips, and troubleshoot old hardware.