4 ms·
According to Wikipedia (http://en.wikipedia.org/wiki/History_of_Mac_OS#System_1.2C_2.2C_3_.26_4 http://en.wikipedia.org/wiki/History_of_Mac_OS#System_1.2C_2...)
by jparise 17y ago
According to Wikipedia (http://en.wikipedia.org/wiki/History_of_Mac_OS#System_1.2C_2.2C_3_.26_4 http://en.wikipedia.org/wiki/History_of_Mac_OS#System_1.2C_2...), System 2.0 is from 1985, not 1987 as listed.