Since the firm's founding in 1978, Mr. Gezelter has worked extensively with the OpenVMS™ (and RSX-11™) Asynchronous System Trap (AST) facility. His work has included:

• developing applications making extensive use of the OpenVMS™ Asynchronous System Trap (AST) facility to provide high performance, robust applications in a range of applications, including terminal management and networking.
• developing middleware components which make extensive use of ASTs to permit the efficient, robust handling of events comming from different client applications in an indeterminate order. One example of such an application was a trading system middleware component which was completely implemented using a series of AST routines. This component went through three major releases without encountering a significant synchronization bug, despite the complexity inherant in operating with multiple communications, applications, and timer links.
• advising clients on the use of the AST mechanism to improve the efficiency and reliability of applications making use of the AST mechanism.
• speaking on Event Driven Systems constructed on OpenVMS™ and AST-related programming and internals topics at DECUS Symposia in the United States, Canada, Switzerland, France, and Turkey. Presentations have included both one hour sessions and full day seminars.