How to learn computer software maintenance

Often have many of my friends asked me the computer so mysterious, ubiquitous application, then how can we learn computer? (In fact I am also a computer just scholars, but access to more than they do.) Of course, I told him, according to your learning aim to follow the teacher is the best teacher is the best of science. However, due to various reasons, not everyone can meet after their teacher to learn. Well, for starters, how self-learning computer? Here I point to my own feelings for

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