rTL

RTL is an acronym that can refer to several distinct concepts in technology, linguistics, and media. In computing and electronics, it most commonly denotes a register-transfer level design or a runtime library. In typography and software localization, RTL stands for right-to-left text direction used by certain languages.

Right-to-left text direction is applied to scripts such as Arabic, Hebrew, and Persian. It governs the ordering of characters and the alignment of lines and blocks in user interfaces. Modern software uses Unicode bidirectional rendering to display mixed scripts correctly, and developers may insert directionality markers to control flow.

Register-transfer level is a design abstraction in digital electronics. It describes circuits in terms of storage elements (registers) and the data paths that move signals between them on clock edges. RTL is a common early stage in hardware design, typically described in languages like VHDL or Verilog, and is subject to functional simulation and synthesis into gate-level implementations.

A runtime library is a collection of software routines provided by a programming language implementation that are available during program execution. It includes basic I/O, math, memory management, and system interfaces. Examples include the C standard library, the C++ standard library, the Java Class Library, and the .NET Base Class Library.

RTL Group is a major European media company, operating television and radio networks across several countries.