This nomenclature follows Cisco’s standard naming convention for networking software: : Indicates the hardware platform, the Cisco Aironet 1240AG Series Go to product viewer dialog for this item. Access Point.
: If the AP's firmware is corrupted, users often rename this file to c1240-k9w7-tar.default and host it on a TFTP server . C1240 K9w7 Tar 124 25d Ja2 Tar 26
: Change the file on your TFTP server to c1240-k9w7-tar.default . C1240 K9w7 Tar 124 25d Ja2 Tar 26
: If you are using the "mode button" recovery method, the file must often be renamed to c1240-k9w7-tar.default and hosted on a TFTP server . C1240 K9w7 Tar 124 25d Ja2 Tar 26
The text you provided appears to be a specialized shorthand or archival reference for from the WWII era.