1986 REMark Heath Zenith User Group Magazines Computer Advertisements JAN-DEC

1987 REMark Heath Zenith User Group Magazines Computer Advertisements JAN-DEC

1985 REMark Heath Zenith User Group Magazines Computer Advertisements FEB-DEC

Rare Heathkit ED100 Floppy Disk Drive Assembly Manual and Schematic

1991 REMark Heath Zenith User Group Magazines Computer Advertisements 1-10/12

TI-99/4A random book lot Texas Instruments Vintage

1988 REMark Heath Zenith User Group Magazines Computer Advertisements JAN-DEC

1989 REMark Heath Zenith User Group Magazines Computer Advertisements JAN-DEC