Create a macro that replaces the value for you given arrays or if statements.
Alternatively, you can use the vlookup function as follows:

Input all the data where 2nd column is translation for the code for example

ColA ColB
1 MSP 510
2 MSP2 511
3 MSP3 512

you can then enter the following formula in your data table in any available
column you want to show the translation
=VLOOKUP(D1,$A$1:$B$25,2,FALSE)
where D1 = colrow of where "MSP"
where $A$1:$B$25 is the 25 codes you have in a table (or you can name the
range and replace here

Good luck.

"Brooks W." wrote:

I am trying to see if there is a way to change text entered into a cell into
a number based on the text entered. As an example, an airport code of MSP
would need to be changed to a store number 510. Is there a way to do this in
Excel 2000? There are about 25 codes that could be entered and of course 25
numbers.

Any suggestions would be appreciated.

--
Brooks W.