Page "Analytical Engine" Paragraph 8

The programming language to be employed by users was akin to modern day assembly languages.

Loops and conditional branching were possible, and so the language as conceived would have been Turing-complete as later defined by Alan Turing.

Three different types of punch cards were used: one for arithmetical operations, one for numerical constants, and one for load and store operations, transferring numbers from the store to the arithmetical unit or back.

There were three separate readers for the three types of cards.