Pre-Morse telegraphs and codes
Early in the nineteenth century, European experimenters made progress with electrical signaling systems, using a variety of techniques including static electricity and … See more

Morse codes of one version or another have been in use for more than 160 years — longer than any other electrical message encoding … See more

International Morse code is composed of five elements:
1. short mark, dot or dit ( ▄ ): "dit duration" is one time unit long
2. long … See more

People learning Morse code using the Farnsworth method are taught to send and receive letters and other symbols at their full target speed, that is with normal relative timing of the … See more

Decoding software for Morse code ranges from software-defined wide-band radio receivers, coupled to the Reverse Beacon Network, which decodes signals and detects CQ messages on ham bands, to smartphone applications. See more

Morse code speed is measured in words per minute (WPM) or characters per minute (CPM). Characters have differing lengths because they contain differing numbers of dits and dahs. Consequently, words also have different lengths in terms of dot duration, … See more

Cut numbers
Most numbers have an unofficial short-form, given in the table below. They are only used when both the sender and the receiver understand that numbers, and not letters, are intended; for example, one often sees the most … See more