A slot is a small opening or groove, often in a machine or other object. A slot can also refer to an interior space within a desk or other structure. For example, a mail slot in a post office accepts a letter that has been marked with an identifying number. The person who occupies the slot will be the one who is responsible for mailing the letter. A letter can be sent to multiple addresses, a slot in a bank vault can hold several thousand bills.
A slot is an authorization for an aircraft to land or take off at a particular airport. It helps to manage the flow of air traffic at busy airports by preventing repeated delays due to multiple flights. For example, a person with a Slot card may play video games. This type of behavior can be a sign of a troubled relationship. A person who is a SLOT will be very likely to be single-minded and not care about other people.
A slot is a type of port on a computer. It can accept a variety of different types of hardware, including hard drives, memory modules, and expansion cards. A computer with a slot can also accept an external expansion board. A computer with a slot can also have bays for a disk drive, which are typically located in the front or back of the system. If the computer has many slots, there is a good chance that one of them will be used by several different types of aircraft.