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Application Development: Core Topics
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These topics consist of the most commonly needed programming concepts and reference material for the InterSystems IRIS Data Platform.

Defining and Using Classes  Describes how to create and use InterSystems IRIS classes and objects.
ObjectScript Tutorial  Provides an interactive introduction to the ObjectScript language.
Using ObjectScript  Provides an overview of and details about the ObjectScript programming language.
Using InterSystems SQL  Provides information about using SQL with InterSystems IRIS.
InterSystems SQL Optimization Guide  Provides information about improving performance of InterSystems SQL.
InterSystems SQL Reference  Provides reference material on InterSystems SQL commands, functions, and predicate conditions, and lists of data types and reserved words.
ObjectScript Reference  Provides reference material for ObjectScript.
Class Definition Reference  Provides reference information on the structure of and elements used in class definitions.
Orientation Guide for Server-Side Programming  Presents the essentials for programmers who write server-side InterSystems IRIS code.
%UnitTest Tutorial  Provides an interactive introduction to creating unit tests with the %UnitTest package.
InterSystems IRIS Error Reference  Lists error codes associated with general operations, SQL, the database engine, and productions.
InterSystems Glossary of Terms  Provides definitions of InterSystems IRIS terminology.