GT.M is a high-end database application development platform offered by Fidelity National Information Services (FIS). GT.M provides an M (also known as MUMPS) language environment that largely complies with ISO/IEC 11756:1999. GT.M's compiler for the standard M scripting language implements full support for ACID (Atomic, Consistent, Isolated, Durable) transactions, using optimistic concurrency control and software transactional memory (STM) that resolves the common mismatch between databases and programming languages. The GT.M data model is a hierarchical associative memory (that is, multi-dimensional array) that imposes no restrictions on the data types of the indexes and the content - the application logic can impose any schema, dictionary or data organization suited to its problem domain.

GT.M's unique ability to create and deploy logical multi-site configurations of applications provides unrivaled continuity of business in the face of not just unplanned events, but also planned events, including planned events that include changes to application logic and schema.

You can install and manage GT.M using the utilities described in this manual and standard operating system tools. The first three chapters provide an overview of GT.M, installation procedures, and GT.M system environment. The remaining chapters describe GT.M operational management.

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