India, Sept. 28 -- In the 3rd century BCE, the Greeks wrote without any spaces, punctuations or distinction between capital letters or lowercase. To the modern eye this would look like undecipherable code: just capital letters scribbled together continuously on stone tablets and scrolls. Understanding unfamiliar documents on the first read was a struggle, so the humble dot was introduced to break the stream of text. The suggestion, by a librarian in Alexandria, was a breakthrough. The dots represented pauses but not the grammatical boundaries of punctuation today. It was only by the 7th century CE that these dots were distinguished according to their placement (low, middle and high) to represent short, medium or long pauses, as well as hori...