Speed dial
（重定向自Speed dialling）
Speed dial is a function available on many telephone systems allowing the user to place a call by pressing a reduced number of keys. This function is particularly useful for phone users who dial certain numbers on a regular basis. The capability for speed dial historically dates at least as far back as 1965. Other early "instant dialers" as far back as the year 1972 also included punched card machines and magnetic tape machines.