I used Stewart's text at McMaster in '82 as a coil-bound, courier-font tome with hand-drawn diagrams for $10. Steward was my 1st year calculus prof and he was the best math teacher I've ever had. He certainly wasn't rich back then, and if he made shrewd investments with his book income, all the power to him. Remember that the publisher sets the price and profit margin, the author only gets a sliver; fortunately, the book sold well. Publishers are like thieves in the way they force schools to unnecessarily sell a new edition every year.

The 24/7 is a good point - we have East and West coast N.A. teams and South Asia and Middle East teams; so there's dev going on around the clock. But I like the idea of making the slaves work harder than the master (ugh, such terminology). I also like the remote-worker "anywhere" has a consistent, accessible environment.

I installed Symantec Norton antivirus and use Norton Family (no extra cost). I've used it very successfully for my two daughters' computers for everything except YouTube for the past 3 years. Because I don't want to block youtube entirely, they can only watch it while being supervised. Also, their computers are in the family room, not their bedrooms. As they get older, I gradually lighten the restrictions. Many activities can be monitored when not restriced and regular reports are emailed of questionable website visits, etc.