besides this?:
DIMENSION laArray[3]
laArray[1] = "SDE"
laArray[2] = "MJS"
laArray[3] = "JSE"
Especially if you have more elements, this can be handy:
=alines(laArray, chrtran("SDE,MJS,JSE", ",", chr(13)))
>What is the most effective way to make this an array? SDE,MJS,JSE
Peter Franz