I got all of my certifications for Mac server, and this summer I am going to learn about another server OS (I'm still in high school, so I have lots of time). Do you think it is better to learn about Linux or Windows, especially if I want to get a job next summer? Windows is of course more popular than Linux and Windows servers will be used to manage Windows computers (and web, exchange, etc. while you're at it), but any technological company/enthusiast often uses Linux. Which should I choose? Thanks.