Bookmarker is a personal project by @dellsystem to help with retaining reading material. Source on GitHub.

(also known as the window of discourse) the range of ideas the public will accept; used by media pundits; derived from its originator, Joseph P. Overton (1960–2003),[3] a former vice president of the Mackinac Center for Public Policy


my deep attraction to the idea of the 'Overton Window', a concept invented by US conservatives to describe what is deemed politically possible at any given time

—p.xviii Foreword to the Paperback Edition (xi) by Owen Jones
notable
9 years ago