RTL/2 (Real-Time Language) is a discontinued high-level programming language for use in real-time computing, developed at Imperial Chemical Industries, Ltd. (ICI), by J.G.P. Barnes. It was originally used internally in ICI but was distributed by SPL International in 1974.It was based on concepts from ALGOL 68, and intended to be small and simple. RTL/2 was standardised in 1980 by the British Standards Institution.