Yes and No. As Jess said, In 0 specifies lowest work area. You'd want to change your commands to:

Use table1 In 0
Use table2 In 0
Use table3 In 0

Each table will then open in the next lowest available work area. Use of specific work areas is incorrect, you should always use an alias (normally same as table name whereby you don't need to specify an alias).

>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