One such system, called eQSL,[REF] enables electronic exchange of QSLs as jpeg or gif images which can then be printed as cards on the recipient's local inkjet or laser printer, or displayed on the computer monitor.
Even in the presence of electronic QSLs, physical QSL cards are often fine historical or sentimental keepsakes of a memorable location heard or worked, or a pleasant contact with a new radio friend, and serious hams may have thousands of them.