Title: Alphabet
Content:  spread by the Phoenicians across the Mediterranean. In Greece, the script was modified to add vowels, giving rise to the ancestor of all alphabets in the West. It was the first alphabet in which vowels have independent letter forms separate from those of consonants. The Greeks chose letters representing sounds that did not exist in Greek to represent vowels. Vowels are significant in the Greek language, and the syllabical Linear B script that was used by the Mycenaean Greeks from the 16th century BC had 87 symbols, including 5 vowels. In its early years, there were many variants of the Greek alphabet, a situation that caused many different alphabets to evolve from it.
Title: Greek language
Content:   Greek has been written in the Greek alphabet since approximately the 9th century BC. It was created by modifying the Phoenician alphabet, with the innovation of adopting certain letters to represent the vowels. The variant of the alphabet in use today is essentially the late Ionic variant, introduced for writing classical Attic in 403 BC. In classical Greek, as in classical Latin, only upper-case letters existed. The lower-case Greek letters were developed much later by medieval scribes to permit a faster, more convenient cursive writing style with the use of ink and quill. The Greek alphabet consists of 24 letters, each with an uppercase (majuscule) and lowercase (minuscule) form. The letter sigma has an additional lowercase form (ς) used in the final position:
Title: History of writing
Content:   The history of the Greek alphabet began in at least the early 8th century BCE when the Greeks adapted the Phoenician alphabet for use with their own language. The letters of the Greek alphabet are more or less the same as those of the Phoenician alphabet, and in modern times both alphabets are arranged in the same order. The adapter(s) of the Phoenician system added three letters to the end of the series, called the "supplementals". Several varieties of the Greek alphabet developed. One, known as Western Greek or Chalcidian, was used west of Athens and in southern Italy. The other variation, known as Eastern Greek, was used in present-day Turkey and by the Athenians, and eventually the rest of the world that spoke Greek adopted this variation. After first writing right to left, like the Phoenicians, the Greeks eventually chose to write from left to right. 
Title: Greek alphabet
Content: The uppercase and lowercase forms of the twenty-four letters are: The Greek alphabet has been used to write the Greek language since the late ninth or early eighth century BC. It is derived from the earlier Phoenician alphabet, and was the earliest known alphabetic script to have distinct letters for vowels as well as consonants. In Archaic and early Classical times, the Greek alphabet existed in many local variants, but, by the end of the fourth century BC, the Euclidean alphabet, with twenty-four letters, ordered from alpha to omega, had become standard and it is this version that is still used for Greek writing today. Α α, Β β, Γ γ, Δ δ, Ε ε, Ζ ζ, Η η, Θ θ, Ι ι, Κ κ, Λ λ, Μ μ, Ν ν, Ξ ξ, Ο ο, Π π, Ρ ρ, 
Title: History of the Greek alphabet
Content:  arrangement is much less suitable for Greek than for Semitic languages, and these matres lectionis, as well as several Phoenician letters which represented consonants not present in Greek, were adapted according to the acrophonic principle to represent Greek vowels consistently, if not unambiguously. The Greek alphabet was developed by a Greek with first-hand experience of contemporary Phoenician script. Almost as quickly as it was established in the Greek mainland, it was rapidly re-exported, eastwards to Phrygia, where a similar script was devised. It was also exported westwards with Euboean or West Greek traders, where the Etruscans adapted the Greek alphabet to their own language, which eventually led to the Latin alphabet.
Title: History of the alphabet
Content: Adoption Descendants   By at least the 8th century BCE the Greeks borrowed the Phoenician alphabet and adapted it to their own language, creating in the process the first "true" alphabet, in which vowels were accorded equal status with consonants. According to Greek legends transmitted by Herodotus, the alphabet was brought from Phoenicia to Greece by Cadmos. The letters of the Greek alphabet are the same as those of the Phoenician alphabet, and both alphabets are arranged in the same order. However, whereas separate letters for vowels would have actually hindered the legibility of Egyptian, Phoenician, or Hebrew, their absence was problematic 
Title: History of the Greek alphabet
Content:   The history of the Greek alphabet starts with the adoption of Phoenician letter forms in the 9th–8th centuries BC during early Archaic Greece and continues to the present day. The Greek alphabet was developed during the Iron Age centuries after the loss of Linear B, the syllabic script that was used for writing Mycenaean Greek until the Late Bronze Age collapse. This article concentrates on the development of the alphabet before the modern codification of the standard Greek alphabet. The Phoenician alphabet was strictly speaking one that was consistently explicit only about consonants, though even by the 9th century BC it had developed matres lectionis to indicate some, mostly final, vowels. 
Title: Greek alphabet
Content:  σ/ς, Τ τ, Υ υ, Φ φ, Χ χ, Ψ ψ, and Ω ω. The Greek alphabet is the ancestor of the Latin and Cyrillic scripts. Like Latin and Cyrillic, Greek originally had only a single form of each letter; it developed the letter case distinction between uppercase and lowercase in parallel with Latin during the modern era. Sound values and conventional transcriptions for some of the letters differ between Ancient and Modern Greek usage because the pronunciation of Greek has changed significantly between the fifth century BC and today. Modern and Ancient Greek also use different diacritics. Apart from its use in writing the Greek language, in both its ancient and its modern forms, the Greek alphabet today also serves as a source of technical symbols and labels in many domains of mathematics, science, and other fields.
Title: History of the alphabet
Content:  used for vowels. For example, the Greeks had no glottal stop or voiced pharyngeal sounds, so the Phoenician letters ’alep and `ayin became Greek alpha and o (later renamed o micron), and stood for the vowels and  rather than the consonants  and. As this fortunate development only provided for five or six (depending on dialect) of the twelve Greek vowels, the Greeks eventually created digraphs and other modifications, such as ei, ou, and o (which became omega), or in some cases simply ignored the deficiency, as in long a, i, u. Several varieties of the Greek alphabet developed. One, known as 
Title: Greek alphabet
Content:  During the Mycenaean period, from around the sixteenth century to the twelfth century BC, Linear B was used to write the earliest attested form of the Greek language, known as Mycenaean Greek. This writing system, unrelated to the Greek alphabet, last appeared in the thirteenth century BC. In the late ninth century BC or early eighth century BC, the Greek alphabet emerged. The period between the use of the two writing systems, during which no Greek texts are attested, is known as the Greek Dark Ages. The Greeks adopted the alphabet from the earlier Phoenician alphabet, one of the closely related scripts used for the West Semitic languages, calling it Φοινικήια γράμματα 'Phoenician letters'. However, the Phoenician alphabet is limited to consonants. When it 

Question: where did the greek alphabet come from?
Answer: Indo-European languages.