In 1983 the best number of buttons was not clearly established. PCs (the few that had mice) were tending to two according to the reference, while workstations w

In 1983 the best number of buttons was not clearly established. PCs (the few that had mice) were tending to two according to the reference, while workstations were tending to three. https://en.wikipedia.org/wiki/Mouse_button#Number_of_buttons https://en.wikipedia.org/wiki/Mouse_button#Number_of_buttons