Discover your family history in millions of family trees and more than 11 billion birth, marriage, death, census, and military records. Search historical records. Discover your family history in millions of family trees and more than 11 billion birth, marriage, death, census, and military records. Search historical records. Start a free family tree online and let us do the searching for you! You'll get hints when we find info that matches your relatives. Start a FREE family tree.
invention category A group or set of inventions that are classified together because of common characteristics. Invention groups that include Agricultural, Communications, Computing, Energy, Transportation and more.
1 On the board, write: An invention is ... and ask the class to brainstorm answers. 2  For example, an invention is: something new, something created by a person, something that people use. 3  When this list is complete, ask them to develop a definition of invention.