TRS-80 Color Computer single sided 5.25" disk
From Just Solve the File Format Problem
The TRS-80 Color Computer single sided 5.25" disk was the main disk format used by the TRS-80 Color Computer (CoCo). The 26-302, 26-3029, FD-500 (26-3129), and FD-501 (26-3131) drives used this format, while the FD-502 (26-3133) used the TRS-80 Color Computer double sided 5.25" disk.
