Hipster PDA
The Hipster PDA is a paper-based personal organizer, popularized by Merlin Mann in 2004. Originally a tongue-in-cheek reaction to the increasing expense and complexity of personal digital assistants (PDA), the Hipster PDA (said to stand for "Parietal Disgorgement Aid" and often abbreviated to "hPDA") comprises a sheaf of index cards held together with a binder clip.