3 ms·
Leitner Box. Syncing kind of sucks though. https://en.wikipedia.org/wiki/Leitner_system https://en.wikipedia.org/wiki/Leitner_system
by nathanasmith 5y ago
Leitner Box. Syncing kind of sucks though.
https://en.wikipedia.org/wiki/Leitner_system https://en.wikipedia.org/wiki/Leitner_system