Rather than producing a faster processor and faster, companies like Intel and AMD multi-core producing devices: single chips containing two, four, or more processors. If your program does not coincide, they will only run on a single processor at a time. Erlang is a programming language designed for building highly parallel, distributed, fault-tolerant systems. It has been used commercially for many years to build fault-tolerated systems that run great for years with minimal failures. Erlang programs run seamlessly on multi-core computers: this means your Erlang program should run much faster on a 4 core processor than a single core processor, all without your having to change lines of code. Erlang combines ideas from the world of functional programming with techniques for building fault-tolerant systems to make a powerful language for building massively parallel future network applications. See how to write applications that run even stronger in the face of network and hardware failure, using the Erlang programming language.