what is phonology?
Each sign in ASL is composed of a number of distinctive components, generally referred to as parameters which are the phonemes.
American Sign Language
those parameters are the phonemes that distinguish meaning in signed languages like ASL. 
when was asl recognized as an official language UNANSWERABLE who created it? Thomas Hopkins Gallaudet how is it classified? It brought together Old French Sign Language, various village sign languages, and home sign systems; ASL was created in that situation by language contact. do you know what percentage of the population uses it? UNANSWERABLE is there a stigma to it? Stigmas associated with sign languages and the use of sign for educating children often lead to the absence of sign during periods in children's lives when they can access languages most effectively. what is its syntax? ASL is a subject–verb–object (SVO) language, but various phenomena affect that basic word order. Basic SVO sentences are signed without any pauses do you know how many people use sign language? Between 250,000 and 500,000 are there different varieties? Yes, mutual intelligibility among ASL varieties is high, and the variation is primarily lexical. what are the properties of s-v-o? Subject–verb–object languages almost always place relative clauses after the nouns which they modify and adverbial subordinators before the clause modified, with varieties of Chinese being notable exceptions. can you give me a few examples? "The dog bit Andy" and "Andy bit the dog" mean two completely different things, while, in case of "Bit Andy the dog", it may be difficult to determine whether it's a complete sentence or a fragment, with "Andy the dog" the object and an omitted/implied subject. what is fingerspelling in asl? A form of borrowing, a linguistic process wherein words from one language are incorporated into another.
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American Sign Language [SEP] Phonology
Each sign in ASL is composed of a number of distinctive components, generally referred to as parameters. A sign may use one hand or both. All signs can be described using the five parameters involved in signed languages, which are handshape, movement, palm orientation, location and non-manual markers. Just as phonemes of sound distinguish meaning in spoken languages, those parameters are the phonemes that distinguish meaning in signed languages like ASL. Changing any one of them may change the meaning of a sign, as illustrated by the ASL signs THINK and DISAPPOINTED: There are also meaningful non-manual signals in ASL, which may include movement of the eyebrows, the cheeks, the nose, the head, the torso, and the eyes.