Those extensions are defined on the listed-directory screen the extensions are incoming DID or DNIS digits sent from the trunk provider for incoming calls and are directly related to 800 numbers or 10 digit numbers being called from the outside world.
This article is about the writer. For the passenger train service, see Carl Sandburg (train). Carl Sandburg (January 6, 1878 â July 22, 1967) was an American poet, writer, and editor who won three Pulitzer Prizes: two for his poetry and one for his biography of Abraham Lincoln.
Most books are secondary sources, where authors reference primary source materials and add their own analysis. Lincoln at Gettysburg: the Words that Remade America by Gary Wills is about Abraham Lincoln's Gettysburg Address.