91.  Telecommuting is practical as long as a good system of monitoring has been developed along with the efficient communication.

92.  It is true that they invented some organize systems, such as Andriod, Blackberry.

93.  In the same year, he released Mac personal computer with Mac OS X, one of the most popular operation systems.

94.  LIke Bill Gates, if he hadn't created the windows operating system, we would use another operating system now, and that system would as good as the windows.

95.  Android system is another popular operation platform just second to Apple and it also gets close to the public for its cheaper price.

96.  We still have more consumers of the Windows system than the Mac Ox system.

97.  That 's the most difficult thing to duplicate someone' system .

98.  Online education also makes teachers easier to view student' homework, because they could use some system such as composition view system.

99.  And students tend to use some other system like QQ, which waste their time.

100.  In the early years, the operation system was DOS.