A Brief Introduction to Thomas Jefferson Jefferson invented a decoding device,a lap desk,and an improved type of moldboard plow_.His collection of more than 6400 books became a major part of the Library of Congress.Jefferson revised Virginia's laws and founded its state university.He developed the decimal system of coinage that allows Americans to keep accounts in dollars and cents. A Brief Introduction to Thomas Jefferson ⚫ Jefferson invented a decoding device, a lap desk, and an improved type of moldboard _____. His collection of more than _____ books became a major part of the Library of Congress. Jefferson revised Virginia's laws and ________its state university. He developed the decimal system of coinage that allows Americans to keep accounts in dollars and cents. plow 6400 founded