(1), state the full name actually is: competitive state, multi-process environment, multiple processes at the same time seize system resources (memory, CPU, file IO).
(2), the state of competition in the operating system OS is very dangerous at this time of the operating system OS if no deal will result in inconclusive results.
(3), the results certainly do not want to write a program running is uncertain, so we have to try to eliminate the competitive state when writing programs. Operating system provides us with a range of mechanisms actually destroy the state, we need to do is to eliminate static using suitable methods in the right place.