Literally ... getting breakfast and checking things. Elroy has been replaced by Harry in Chapter 23 like he should have been now - updated. Also, uploaded replacement Chapters 13 - 22, with corrections made. Nothing earth shattering, just typo's and minor cleaning of things up.
Also, regarding the comments about switches ... remember the software that Cal gave to Sandy & Len, and how everyone talks about how they're suddenly 5 plus years ahead of their competition? He knew about switches, so he just included the software and information on how to make them. (It'll become obvious in Chapter 35 that the pain of dial-up may be something that many people never have to experience.)