$ cat inventory
Item   Amount   Cost     Value Description
----   ------  -----   ------- --------------
   1        3   5.00     15.00 rubber gloves
   2      100   0.50     50.00 test tubes
$ rename Amount Qty Description Whatsit < inventory
Item      Qty    Cost    Value Whatsit
----      ---  ------  ------- --------------
   1        3    5.00    15.00 rubber gloves
   2      100    0.50    50.00 test tubes

$ record 2 < maillist

Number  2
Name    Chiquita  Banana
Company United Brands
City    San Jose
State   Costa Rica

$ record 2 < maillist | rename Number Client Name Contact

Client  2
Contact Chiquita  Banana
Company United Brands
City    San Jose
State   Costa Rica