All of the models in the Commodore 8060 series use group coded recording which refers to several distinct but related encoding methods for magnetic media.
All of the models in the 8060 series use Commodore group coded recording (GCR) for disk reading and writing; the later 8061 and 8062 models can also read and write IBM 3740 format disks. In computer science, group coded recording or group code recording (GCR) refers to several distinct but related encoding methods for magnetic media. 
