TCP/IP Programming in COBOL and Assembler (z/VSE and z/OS).
Operating System Instalation and upgrades (z/VSE and z/VM).
System Tuning (z/VSE).
Additionally:
TEI works closely with Barnard Software, Inc. (BSI)
on their IPv6/VSE product.
Our staff wrote and maintains the IPv6/VSE Application Programming Interface (API).