Slide rule 计算尺
（重定向自Sliderule）
![A typical ten-inch student slide rule (Pickett N902-T simplex trig).](/Images/godic/202502/11/Sliderule.PickettN902T.agr2718.jpg")
![Cursor on a slide rule.](/Images/godic/202502/11/Slide_rule_cursor2718.jpg")
![](/Images/godic/202502/11/Pocket_slide_rule2718.jpg")
![](/Images/godic/202502/11/Slide_rule_example2_with_labels.svg2718.png")
The slide rule, also known colloquially in the United States as a slipstick, is a mechanical analog computer. The slide rule is used primarily for multiplication and division, and also for functions such as roots, logarithms and trigonometry, but is not normally used for addition or subtraction. Though similar in name and appearance to a standard ruler, the slide rule is not ordinarily used for measuring length or drawing straight lines.