Noted hardware historian and reverse-engineer Ken Shirriff recently found the exact transistors in the original Intel Pentium which caused the "FDIV bug", leading to a $475 million recall in 1994.

[Ken Shirriff] has been sharing a really low-level look at Intel’s Pentium (1993) processor. The Pentium’s architecture was highly innovative in many ways, and one of [Ken]’s most recent ...

Today that count went up to two. It’s called the 86Duino and stuffs an old Pentium II-class machine capable of running DOS, Windows, and Linux into the space of an Arduino, The 86Duino Zero ...