This has come up before a few years ago on this very reflector. Among the state and province abbreviations that have other meanings are Names and pronouns: AL MO MA PA ME Common words: IN OR OK ON OH HI Ham short forms and prosigns: GA DE AR SK, also HI For example, "OH, HI AL, GA! 599 MO IN OR, OK? DE W7AY AR SK" 73 Chen, W7AY