First phonograph was invented by Edison , for record and preserve sound . Them cortina makes changes in it by recording foreign language.  Then two experiments in ohio university and mississippi woman college. That how they deal with it and use it. Many changes done in it. Then invention of radio ,  tape recorder , video tape and television after the world war ii.After World War II, language laboratories were spread gradually. There were some new trends with them. They became in use for other
purposes besides foreign language instruction. In America language laboratory was under the NDEA national defence education act established. 


 Language learning software develops our four skills LSRW.
This helps in increase vocabulary. Rules of grammar also helps to developed language with correct word. This software make us able to get knowledge of language completely by various necessary part of language. Communication skill developed the skill of conversation variously. Through exercises we able to learn easily. That proves to learn language through technology is very helpful. Students learn to work their own pace and learn in their own way. They learn independently of teacher.

There is also disadvantages of it. It is connected with technology that's why sometimes have problems to deal with it. Sometimes servers down that's why hard to work with it. Technical issues makes it problematic in learning language. One of the disadvantage is lack of feedback from live instructor.