I absolutely love this series in general. watched several videos twice. A short nit, the IBM typewriter segment, You traced it from the Model 01 to the Selectric One. You identified an early version as the Model A, nope that was the Model B. Model A had the ribbon in ears on the outside. I used to fix these for IBM and own versions of the various models including an early 01.
Another really informative video. Thank you! Your knowledge and insight of design is very valuable and helps one learning to consider all elements of the design process.
