1. The linguistic system uses a raised dot to indicate vowel length. 2. This linguistic system has been variously called interlanguage, approximative system, 3. Sounds as part of a linguistic system are called phonemes. 4. This comparison suggests the existence of a separate linguistic system . 5. Despite the difference, the understanding of both linguistic systems calls for the appropriate background knowledge. 6. American Sign Language is a highly structured linguistic system , and includes all complexities of spoken languages. 7. Although stress is mostly predictable, the linguistic system uses the acute accent to indicate predictable main stress. 8. Children originate with a linguistic system where words they learn, are the words used for functional meaning. 9. Halliday follows Louis Hjelmslev in seeing linguistics as the study of both instances of language and the linguistic system . 10. They conclude that the method used by Rao et al . cannot distinguish linguistic systems from non-linguistic ones.