* Cray-1 Pocket Reference
<https://nitter.it/aka_pugs/status/1546576975166201856>
<https://ftp.libre-soc.org/cray-1-pocket-ref/>
+ <https://www.computerhistory.org/collections/catalog/102685876>
* <https://github.com/tdene/synth_opt_adders> Prefix-tree generation scripts
* <https://debugger.medium.com/why-is-apples-m1-chip-so-fast-3262b158cba2> N1
* <https://codeberg.org/tok/librecell> Libre Cell Library