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IBM sold a mouse with a pointing stick in the location where a scroll wheel is common now. A pointing stick on a mid-1990s-era Toshiba laptop. The two buttons below the keyboard act as a computer mouse: the top button is used for left-clicking while the bottom button is used for right-clicking.
NGC 5930 is a starburst galaxy [5] in the constellation Boötes that is interacting with the nearby Seyfert galaxy NGC 5929. 5930 has a morphological classification of SAB(rs)b pec, [3] indicating that it is a weakly-barred spiral galaxy with a poorly defined nuclear ring structure.