Warren East left Texas Instruments Inc. to join core maker ARM Holdings plc in 1994, when the U.K. company was “small enough to worry about whether it could pay the salaries at the end of the quarter.

You have 20 muscles in your forearm, the part of your arm between your elbow and your hand. They help you move your arms, hands, and fingers and perform many of the tasks of daily life. You can strain ...