There are actually a lot of digital modes that have been developed over the years. Each has been developed for particular uses. The STEMLab software lets you easily access and gain experience any of these.

• RadioTeleTYpe (RTTY)  🔗 Radioteletype (Wikipedia)
• AMTOR  🔗 AMTOR and PACTOR (G4AON)
• PACTOR  🔗 AMTOR and PACTOR (G4AON)
• Clover  🔗 Clover (ARRL)
• Frequency Shift Keying (FSK)  🔗 Frequency Shift Keying (Wikipedia)
• Phase Shift Keying (PSK31)  🔗 PSK31 (ARRL)
• Facsimile (FAX)  🔗 Radiofax (Wikipedia)
• Slow Scan TeleVision (SSTV)  🔗 SSTV - Slow Scan Television (ARRL)
• Automatic Identification System (AIS)  🔗 Automatic Identification System (AIS) Overview
• Continuous Wave (CW)  🔗 Continuous Wave (Wikipedia)
• WSPR  🔗 WSPR (ARRL)
• FT8  🔗 FT8 (ARRL)
• FT4  🔗 FT4 (SigIDWiki)