The slot is a time and place for an aircraft to take off or land, assigned by the airport or air-traffic control authority. In the case of an airliner, it is usually a specific runway and terminal, but may also be a particular type of flight, such as a domestic or international service. The slot is the allocation of a set of permitted operations, and it is only valid for the duration of one calendar day. It is much more efficient for an airline to use a slot than to remain in the air and burn excess fuel waiting for a suitable window of opportunity, so it has been a great boon to efficiency since its introduction.
In a slot game, a payline is a row of symbols that must appear exactly to award a payout. Generally speaking, the more matching symbols there are, the higher the payout. There are several types of paylines, including horizontal lines (straight up or down), diagonal lines, zig-zag shapes and even a shape, such as a star or heart. The number of paylines varies by machine, and some offer as many as 100 ways to win.
In software development, a slot is a dynamic placeholder that either waits for content (a passive slot) or calls out to a renderer to fill it in (an active slot). A slot can contain any type of content and is generally configured using a combination of a scenario, Add Items to Slot action and a Bitmap Name.
