who created the mouse that is used with computers today
Computer mouse Douglas Engelbart of the Stanford Research Institute (now SRI International) has been credited in published books by Thierry Bardini,[11] Paul Ceruzzi,[12] Howard Rheingold,[13] and several others[14][15][16] as the inventor of the mouse. Engelbart was also recognized as such in various obituary titles after his death in July 2013.[17][18][19][20]
Scroll wheel It is used, as the name suggests, for scrolling. It can often also be used as a third mouse button by pressing on it. The wheel is often – but not always – engineered with detents to turn in discrete steps, rather than continuously as an analog axis, to allow the operator to more easily intuit how far they are scrolling.