>Hi,
>
>When we use the command:
>
>Use table in 0
>
>Does the 0 (Zero) ref a work area ?
>
>And if so can you use the command in the following manner?
>
>Use table1 in 0
>Use table2 in 1
>Use table 3 in 2
>
>select table2
The other answers you got are wonderful. The direct answer is that the 0 (zero) refers to the first unused work area. You can always refer to a work area by number, letter or alias. This is why you can't use the letter 'O' to refer to a work area since it looks so much like a zero.
By the way you could do:

Use table2 in 1
Use table 3 in 2
Use table1 in 0