vfscanf()

The question is, what will be your limiting factor: CPU or disk I/O? Parallel processing doesn’t do much good if the workers have to wait on the disk to deliver more data. I’d start with an async architecture, where the program can do its processing while it is waiting on more data.

A few days before time change (DST) windows would put a little reminder in the calendar widget on the task bar. I always thought that was a really nice feature. Unfortunately, no other operating system does that (as far as I know).

My text editor of choice for many years was gedit. Nowadays, I use emacs