Whether you’re answering emails, beating a deadline, or looking for even more freelance gigs, many professionals simply can’t imagine their career without a laptop. It has become the ultimate work gadget of the 21st century, which many laptops now powerful enough to be used like a PC. However, not all freelancers are the same—and as such, require different tools to get the job done.That being said, here are some of the best laptops for every kind of freelancer imaginable.Best CPU: Apple MacBook Pro (Image Credit: CNet)If you're in the tech field and often deal with multiple p...

The whole boot process of computer can be summarized in 4 phases.1. BIOSIn the 70's  read-only memory(ROM) was invented. The boot program is written into ROM, the first thing the computer does is to read and execute this program when it's powered on.The program in this chip is called "Basic Input/Output System" (BIOS).1.1 Power-On Self-TestThe BIOS will first check whether the computer hardware can fulfill the basic conditions for booting up, this process is called Power-On Self-Test, simplified as POST.If the hardware has problems, the mother board will produce different beeps and the bo...