a tool for scheduling appointments, tracking action items, and managing contact information
a member of a project team or project support office with the responsibility for planning, scheduling and tracking of projects. they are often primarily concerned with schedule, progress and manpower resources.
a book that students use to keep track of their assignments.
Planner (often seen in publications as "PLANNER") is a programming language designed by Carl Hewitt at MIT, and first published in 1969. First subsets such as Micro-Planner and Pico-Planner were implemented and then essentially the whole language was implemented in Popler and derivations such as QA-4, Conniver, QLISP and Ether (see Scientific Community Metaphor) were important tools in Artificial Intelligence research in the 1970's, which influenced commercial developments such as KEE and ART.
Planner is a project management tool for the GNOME desktop, previously named MrProject. Planner is part of the GNOME office suite. It is used for project management and uses Gantt charts to display how project activities commingle and depend on each other.