HDLC Family
Synchronous Data Link Control (SDLC): IBM
High-Level Data Link Control (HDLC): ISO
Link Access Procedure-Balanced (LAPB): X.25
Link Access Procedure for the D channel (LAPD): ISDN
Link Access Procedure for modems (LAPM): V.42
Link Access Procedure for half-duplex links (LAPX): Teletex
Point-to-Point Protocol (PPP): Internet
Logical Link Control (LLC): IEEE
Advanced Data Communications Control Procedures (ADCCP): ANSI
V.120 and Frame relay also use HDLC