For our purposes, it's not the diphtheria-tetanus-pertussis vaccine. It's shorthand for desktop publishing. It can also stand for Direct-to-Plate, a printing method that bypasses the use of film to create printing plates. Doing DTP means doing desktop publishing. Dig into the short story of DTP.
No, not with a printer. With a pen or pencil (or crayon or marker)?

Cursive writing was once the norm in school. But with the introduction of print styles around the 1920s, the teaching of cursive handwriting has been on the decline. Even after learning cursive, many people prefer to print. Learn more about print handwriting and check out fonts for teaching print or for writing in the print style of others.
Image © Jacci Howard Bear; licensed to About.com
It's dots per inch, a measure of the resolution of a printer. DPI is not image resolution although frequently used that way. Connect the dots of DPI.
Sites that have a category of fonts for Mother's Day usually round up some fonts with hearts and flowers or some nice script fonts. They aren't necessarily just for Mother's Day but they make lovely cards. That's true for the 6 free for commercial or personal use Mother's Day fonts I've gathered up. I've even written up some Happy Mother's Day messages to show how they might look in use. Grab them now and use them for any (appropriate) occasion, no mothers required.
Image by J. Bear