Since the late 20th century, many attempts have been made to integrate the simplicity of a notebook with the editing, searching, and communication capacities of computers through the development of note taking software.
Laptop computers began to be called notebooks when they reached a small size in the 1990s, but they did not have any special note-taking ability.
Disc-bound notebooks remove the open or closed operation by modifying the pages themselves.
A page perforated for a disc-bound binding system contains a row of teeth along the side edge of the page that grip onto the outside raised perimeter of individual discs.
Spiral-bound pages can be torn out, but frequently leave thin scraggly strips from the small amount of paper that is within the spiral, as well as an uneven rip along the top of the torn-out page.
Hard-bound notebooks include a sewn spine, and the pages are not easily removed.
Land surveyors commonly record field notes in durable, hard-bound notebooks called "field books." Coloring enthusiasts use coloring notebooks for stress relief.
The pages in coloring notebooks contain different adult coloring pages.
In each of these systems, the pages are modified with perforations that facilitate the specific binding mechanism's ability to secure them.
Ring-bound and rod-bound notebooks secure their contents by threading perforated pages around straight or curved prongs.