Eighth Century BCE.
They adapted the Phoenician alphabet.
The Greeks copied and adapted the Phoenician alphabet for their own use.
The Phoenician Alphabet
The Phoenician alphabet from which the Greeks developed a "true" alphabet, which consists of both vowels andconsonants.
From Phoenician alphabetic script, modified progressively to suit their own language pronunciations. Later 8th Century BCE.
The modern English alphabet consists of 26 letters and is derived from the Latin alphabet:ANSWER:They did not actually invent it, but improved upon the ancient Phoenician alphabet and brought it into wider usage.
The Greeks adapted the Phoenician alphabet for their own communications.
It was copied and adapted by the Greeks and Romans, so becoming the basis of today's cursive writing.
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The alphabet
By this time it consisted of about 700 symbol's that stood for words or syllable's about 1400b.c.,the Phoenicians had developed 22 simple characters for the entire writing system. Each character stood for a consonant.* Later,the Greeks added vowels to the Phoenician alphabet.
The lasting one was developing a system of alphabetic writing which was adapted by the Greeks and Romans and forme the basis of todays Western alphabets.