Texas Instruments TI89 Developer Guide - Page 264

222 Glossary Heap The Heap is an area of memory where all dynamic data is allocated from. All references to the heap are through handles which are unsigned 16 bit quantities. Dereferencing a handle returns a pointer to the actual data for the handle. Unless the handle is locked, the data pointed to by a dereferenced handle may change whenever the heap is compressed. IDE Integrated Development Environment / TI FLASH Studio™. internal form or internally-simplified A form similar to external form but with fewer tags and some tags that do not occur in external form. For example, SUBTRACT_TAG, DIVIDE_TAG, CHS_TAG, LOG_TAG, SIN_TAG, COS_TAG, TAN_TAG, SINH_TAG, COSH_TAG, TANH_TAG, . . . do not appear in internal form. Complex expressions (those having nonzero imaginary parts) are represented using two expressions under an IM_RE_TAG rather than using an I_TAG. Localization Changing the calculator to use the local language of another country. Operating System (OS) The software loaded on all TI-89 and TI-92 Plus calculators. The OS contains the features that are of interest to customers, as well as behind-the-scenes functionality that allows the calculator to operate and communicate. Pretty print Format a mathematical expression so it is easier to read with the goal of making the expression look the way it customarily appears in math text books. Quantum Defined in the system by the C declaration typedef unsigned char Quantum. SDK Software Development Kit  a set of tools that allow developers to write software for specific platforms. Shareware Sometimes called User Supported or Try Before You Buy software. Shareware is not a particular kind of software, it is a way of marketing software. Users are permitted to try the software on their own computer systems (generally for a limited period of time) without any cost of obligation. Payment is required if the user has found the software to be useful or if the user wishes to continue using the software beyond the evaluation (trial) period. Payment of the registration fee to the author will bring the user a license to continue using the software. Most authors will include other materials in return for the registration feelike printed manuals, technical support, bonus or additional software, or upgrades. TI-89 / TI-92 Plus Developer Guide Not for Distribution Beta Version January 26, 2001