Manually Coded English is a system of English codes on the hands, using some ASL signs and initialized signs. It uses English grammar and structure.
MCE is a category of S.E.E 1 (Seeing Essential English), S.E.E. (Signing Exact English). They emerged in the 1970s until 1980s.
For more information about ASL language acquisition as first language, see some suggestions for further reading.
Brenda Schick. "The Development of Sign Language and Manually Coded English Systems." Deaf Studies, Language and Education (2003) by Mark Marschark and Patricia Spencer (Eds). Oxford University Press.
Bahan, B., Hoffmeister, R. and Lane, H. (1996) A Journey Into the Deaf World San Diego, CA. USA: DawnSignPress.
Related topics: simutaneous communication (resources).