on restoring a vintage Xerox Alto computer, currently dead but slowly coming back to life.
The part involved here (a 7414 TTL hex Schmitt trigger inverter) was one I used a lot in my own designs – the Schmitt trigger was very handy for cleaning up noisy signals. However, that meant that typically this part was more exposed than any others to the hazards of that pesky real world – so I saw more failures in them than in any other part. I often used no more than 4 of the 6 inverters in any given design, precisely to allow repair via a dead bug hack. So this photo looked very familiar! :)