http://rapidshare.com/files/244929204/The_PIC_Microcontroller_-_Your_Personal_Introductory_Course.pdf
http://rapidshare.com/files/244926279/The_Microcontroller_Idea_Book.pdf
http://rapidshare.com/files/244925203/The_Eejit_s_Guide_to_the_PIC_Microcontroller.pdf
http://rapidshare.com/files/244920848/The_8051_Microcontroller_Architecture__Programming__and_Applications.pdf
http://rapidshare.com/files/244918794/The_8051_Microcontroller_and_Embedded_Systems_Using_Assembly_and_C-2nd-ed__StudentRockStars.com_.pdf
http://rapidshare.com/files/244916305/Systems_Design_and_the_8051.pdf
http://rapidshare.com/files/244915390/rs232.pdf