Int 5B  - IRQ11 Relocated By Desqview 2.26+
 Int 5B  - IRQ3 Relocated By Doubledos
 Int 5B  - Used By Cluster Adapter
 Int 5B  - At&t Starlan Extended Netbios (variable Length Names)
 Int 5B  - Microsoft Network Transport Layer Interface
 Int 5B  - Used By Alloy Ntnx
 Int 5B  - Isolan Multi Protocol Software
 Int 5B Fn 5254  U - Sitback V3.02r - Get ???
 Int 5B Fn 8485  U - Sitback V3.02r - Installation Check
 Int 5B Fn 8485  U - Sitback V3.02r - Set ??? Flag And Get ??? Address
 Int 5B Fn 8485  U - Sitback V3.02r - Clear ??? Flag
 Int 5B Fn 8485  U - Sitback V3.02r - ???
 Int 5B Fn 8485  U - Sitback V3.02r - ???
 Int 5B Fn 8485  U - Sitback V3.02r - ???
 Int 5B Fn 8485  U - Sitback V3.02r - ???
 Int 5B Fn 8485  U - Sitback V3.02r - Set ??? Flag
 Int 5B Fn 8485  U - Sitback V3.02r - Get Resident Data Segment
 Int 5B Fn 8485  U - Sitback V3.02r - Get Dta
 Int 5B Fn 8485  U - Sitback V3.02r - Toggle ???