[Wendymott]

Umpteen years ago Keithley Lifts used Nor Bits (DTL) in their logic controllers...They made a donation to the Otley Radio Society when they became obsolete, I guess they went onto TTL . We had so many modules it was embarrassing to know what to do with them but some of the members embraced them. At that time I was too wrapped up in RF, to appreciate their value.