OMG. Can you imagine publishing Machine Code for Beginners today??

Usborne 1980s Computer Books

@paco I learnt Z80 assembly code first from instructions seen in listings, and then in Rodnay Zaks "Programming the Z80" book.
By that time we were learning more about thelow level basics, developing was more complex sometimes.
The level of abstraction of today gives a lot of flexibility, but at the same time astrays from the waste of resources: memory space, computing power, energy waste, even for terribly simple applications.