This means that Hairy cell leukemia, or a subtype of Hairy cell leukemia, affects less than 200,000 people in the US population. Ophanet, a consortium of European partners, currently defines a condition rare when it affects 1 person per 2,000. They list Hairy cell leukemia as a rare disease.
In fact, some of the oldest alphabetic symbols have been found in Central America (2,500 years ago), China (more than 3,000 years ago), and the Middle East (more than 5,000 years ago). One of the earliest forms of the alphabet was hieroglyphics. Hieroglyphics were single symbols that stood for entire words.
Who invented the dictionary? Dictionaries have been around since 2300 BC and the oldest dictionaries were discovered in Syria. Over the years Chinese, European, Arabic and English dictionaries were also written. Robert Cawdrey, an English school teacher published the first English alphabetical dictionary. However it was Samuel Johnson who compiled the first widely recognized and reliable dictionary in English in 1755. Samuel Johnson was a popular British author and published âA Dictionary of English Languageâ which took him nine years to complete.