Foreign language learning is a challenging task, involving mastering a new sound system,
phonological and syntactical forms, vocabulary, and sometimes a new writing system. For the
adult second language learner, one of the most frustrating aspects is having an inadequate
vocabulary for expressing complex ideas that are so easy to relate in one’s native tongue. The
acquiring of new vocabulary becomes one of the most important tasks as one strives for fluency
in the second language. This research provides brief overview of how computers have been used
and are being used for language learning. The present research also explores the effects of
CALL1 on vocabulary learning. It discusses the use of the computer for lexical skill development
in relating CALL to vocabulary acquisition via an experimental method and searching for
effective ways to use CALL in vocabulary instruction. The results indicate that in using CALL
program, learners have an intensive mental processing which results in long term recall of words.
CALL also produced better results in contextualized vocabulary learning, plus better
pronunciation. However, the results show that in the first experiment the scores on the
immediate test were considerably higher for the control group, but the scores on the delayed tests
were significantly lower for the control one.