Hello and welcome to the forum,
I issued this command in the ISPF panel,
And you did this why? It is not a good idea to issue commands you've heard of or discovered just to "see what happens".
It is most important to realize that the system is not single user (like a pc) and it is quite possible to break things that you need. If security is not properly implemented (which is becomiing more common), one can break things that others need.
Where did you learn of "tso calc"? It may be one of the sample clists distributed by IBM. . . It may be somethning else altogether.
it showed a lot of numeric values
What did it show? If you post the "output", it may help us help you.
This link mentions the IBM sample:http://publib.boulder.ibm.com/infocente ... /xcalc.htm