A house habitually kept open to callers. / An event, often in one's home, at which there are few restrictions regarding who and how many may attend.

(sometimes attributive) Creative work that others can freely and legally copy or modify.

A female given name from English from the precious stone, invented in the nineteenth century.

(colloquial) A person or thing's normal mode of operation.

Of or relating to operations, especially military operations. / Functioning and ready for use. / Effective or operative. / Determined by means of practical measures.

The regular times of day when a shop, office or similar is open to the public.

A person who operates a telephone switchboard. / A person who provides assistance in establishing a connection, or who provides information or takes messages via the telephone.

(computing) A system allowing hardware and software from different manufacturers to be used together seamlessly. / (physics) A system that can exchange both matter and energy with its surroundings.

(computing) Any simple operation, such as addition, multiplication or division, performed on floating point numbers using a single operation.

A knifelike device with a blunt edge, used for slicing letters open.