CamelCase
The first use of medial capitals was the notation for chemical formulae invented by the Swedish chemist Berzelius in 1813. He did this to replace the large amount of naming and symbol systems used by chemists at that time. He suggested to show each chemical element by a symbol of one or two letters, the first one being capitalized. The capitalization allowed formulae like 'NaCl' to be written without spaces and still be read without confusion. This system is still in use today.