Evolution of Calculators
Yes, that is indeed a 1900s calculator you are seeing, and not a typewriter! Though they might look extraordinarily similar, calculators were indeed a different machine. A 1900s calculator could only process simple calculations, as you can likely conclude from its simple interface.
Calculators today however, function more similarly to computers and can complete a wide range of complicated calculations. The good news is that the modern calculator is significantly more portable and won’t break your back carrying from place to place! Admittedly, that might not be the best news for those taking AP calculus.