1985 Decus Conference Upgrades Programming Vintage Computer IT PC Pin Button

1991 Anaheim California SIG Conference Vintage Computer IT PC Pin Pinback Button

1986 Dallas Texas Decus Conference Vintage Computer IT PC Digital Pin Button

Vintage GEAC Software Operating System Programming Computer IT PC Pin Button

Vintage DEC Netware Operating System Stack Tech Computer IT PC Tech Pin Button

Vintage Decus DEC E-Pubs Electronic Publishing Computer IT PC Pin Pinback Button

Vintage DEC RT-11 PDP-11 Operating System Computer IT PC Pin Pinback Button

1987 Nashville Tennessee DECUS DEC Computer IT PC Tech Vintage Pin Button