Behold Library Hand, a font designed specifically for librarians without typewriters who created cards for card catalogs. What’s cool is the variation within the guidelines:
Via Ella Morton :
Since the aim was legibility, not haste, library hand wasn’t so speedy to execute—but the pace depended on the scribe. Dewey conducted a test in which four cataloguers wrote the Lord’s Prayer in both “catalog hand” and their standard note-taking hand. One cataloguer took three-and-a-half minutes in note-taking hand and almost 12 minutes in catalog hand. But another took three-and-a-half minutes in note-taking hand and four-and-a-half minutes in catalog hand. And the time saved among librarians who had previously mistaken 3s for 5s was priceless.
It came in disjoined (print) and joined (cursive).
• Library Hand, the Fastidiously Neat Penmanship Style Made for Card Catalogs (Atlas Obscura)