Plus: An email spam eliminator, easy document scanning, and a low price on a smart thermostat

Although no panacea exists for protecting your privacy from these tech giants, you can take some steps to limit what they know about you.

Plus: Apple’s subscription push, OfficeMax’s PC checkup scam, and make-your-own Chrome apps

Last week, Apple summoned the tech press to its headquarters to reveal a slew of new services, including a magazine subscription program, a foray into credit cards, and several new video offerings.