Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
developer - n. a person or company that creates computer software
update - v. to change (something) by including the most recent information
operating system - n. the main program in a computer that controls the way the computer works and makes it possible for other programs to function
processor - n. a part of a computer that that handles data
introduce- v. to make (something) available for sale for the first time
download- v. to move or copy (a file, program, etc.) to a computer or device
alternative - adj. offering or expressing a choice
recommendation - n. a suggestion about what should be done
