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The collection bucket for everything you have committed to read or review.
Any set of similar items. Examples include:
Something you have made a commitment to read or review that will take more than 2 minutes. Examples include magazines, proposals, brochures, etc.
This is a model for choosing what to do at any given moment. It is based on the idea of focusing only on what you can possibly do where you are with what you have.
A mechanism to store and retrieve electronic reference material on your computer.
A system of classifying into files (usually arranged alphabetically)
The practice of keeping strict boundaries between items of different types. In GTD, for example, it is highly recommended to keep reference material (which has no emotional cost) separate from commitments and actions you need to keep (which have strong emotional pull). If you blur the edges between items of different types, your system will not be effective.
The habit of filtering possible actions based on whether the energy you have is sufficient to complete them.
The complete inventory of the next physical, visible action you will take to fulfil some purpose.