ObjectScript
ObjectScript is a procedural programming language that can be used to write server-side code on the InterSystems IRIS® data platform. ObjectScript source code is compiled into object code that is highly optimized for operations typically found within business applications, including string manipulations and database access.
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First Look: ObjectScript or ObjectScript QuickStart(short)
ObjectScript Tutorial (longer)
InterSystems ObjectScript Basics (longer)
Building a Server-Side Application with InterSystems IRIS (longest)