https://github.com/tesseract-ocr/tesser ... -Tesseract
(for version 3) is the one you want. Version 4 looks impossibly hard on a Raspberry Pi.
Driver Gothic looks like a spin on DIN 1451
Mittelschrift. It's not expressly an OCR font, but is very simple.
OCR-B, as Dougie said, is a font designed for computer-recognition of text. It was the European standard one. Old Amstrad CPC users like me are fond of it because that's what the Amstrad manual was set in:
Fun fact: although OCR-B is an international standard and used in your passport, you can no longer get the standard drawings. Someone at ECMA threw theirs out, figuring that someone at ANSI would keep theirs. Unfortunately, someone at ANSI had just done the same …
OCR-A is one of the other early OCR fonts. It was designed for the US standard committee. It's not very pretty, but you know it when you see it:
Older still are the MICR fonts, still used on the bottom of cheques and on some countries' mail. They're notably for having a pattern of blobs that when read through a magnetic reader produce a different bit pattern. They're typically only digits, but that's all that was needed when they were introduced in the late 1950s. The two standard fonts are E-13B and CMC-7
and are pretty ugly. You can still buy expensive-modified laser printers that will use iron-loaded toner to print cheques that old MICR machines can read.
I'm so old that I remember when cool, futuristic designs used faux-OCR/MICR fonts to look hip and happening. They look pretty awful now, but they graced so many computer manuals and sci-fi novel covers¹ back in the day:
¹: also, cringeworthily, the late Canadian futurist/cultural theorist Marshall McLuhan's grave
‘Remember the Golden Rule of Selling: “Do not resort to violence.”’ — McGlashan.