We talk about Morse code, named after its inventor, Samuel Morse. However, maybe we should call it Vail code after Alfred Vail, who may be its real inventor. Haven’t heard of him? You aren’t alone.

Some years ago, a colleague and I helped someone with a similar problem to that of Hans-Peter Salzmann (22 February, p 36). At the time, she was using a sequential selection device known as Possum to ...

Larry Kahaner - Larry Kahaner is an American journalist and author who resides in Bethesda, Maryland. Steve Galchutt shows off the custom-made low-wattage transmitter he uses on his treks. Chase Brush ...