Calculates checksum in EAN13-codes, also knowned as barcodes in 
Europe and America (might not work with American codes).
The requerments to run this prog is simply Amos or pen and paper. :)

Includes ascii version of program ONLY, to be able to easly convert to
QBasic or Vbasic on those typewriters....

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                  380     632  60.1% -lh5- 7566 Sep  1  1996 checksum.asc
[generic]                  274     449  61.0% -lh5- ef04 Sep  1  1996 checksum.readme
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         2 files     654    1081  60.5%            Sep  1  1996