Regular stops are made by Traveling Library Center (TLC) vans at housing projects, nursing homes, retirement homes and child care facilities throughout King County outside the city of Seattle.   Annotated lists of staff-selected large print books are available.   Techlab mobile classroom travels to community, youth and senior centers.   The Bellevue, Bothell, Burien, Federal Way, Kent and Shoreline branches have a specially adapted computer which magnifies the library system's computerized catalog and which also has a synthesizer that can "read" the computer screens to you.   The Traveling Library Center also has access to materials in many languages. Printed materials may be available by request in Arabic, Chinese, French, German, Hebrew, Hindi, Japanese, Khmer, Korean, Marathi, Punjabi, Persian, Polish, Portuguese, Russian, Serbo-Croatian, Somali, Spanish, Tagalog, Thai, Ukrainian and Vietnamese.