Lock and key in the context of "Window frame"

A window is an opening in a wall, door, roof, or vehicle that allows the exchange of light and may also allow the passage of sound and sometimes air. Modern windows are usually glazed or covered in some other transparent or translucent material, a sash set in a frame in the opening; the sash and frame are also referred to as a window. Many glazed windows may be opened, to allow ventilation, or closed to exclude inclement weather. Windows may have a latch or similar mechanism to lock the window shut or to hold it open by various amounts.

Types include the eyebrow window, fixed windows, hexagonal windows, single-hung, and double-hung sash windows, horizontal sliding sash windows, casement windows, awning windows, hopper windows, tilt, and slide windows (often door-sized), tilt and turn windows, transom windows, sidelight windows, jalousie or louvered windows, clerestory windows, lancet windows, skylights, roof windows, roof lanterns, bay windows, oriel windows, thermal, or Diocletian, windows, picture windows, rose windows, emergency exit windows, stained glass windows, French windows, panel windows, double/triple-paned windows, and witch windows.

A shed is typically a simple, single-storey (though some sheds may have two or more stories and or a loft) roofed structure, often used for storage, for hobbies, or as a workshop, and typically serving as outbuilding, such as in a back garden or on an allotment. Sheds vary considerably in their size and complexity of construction, from simple open-sided ones designed to cover bicycles or garden items to large wood-framed structures with shingled roofs, windows, and electrical outlets. Sheds used on farms or in the industry can be large structures. The main types of shed construction are metal sheathing over a metal frame, plastic sheathing and frame, all-wood construction (the roof may be asphalt shingled or sheathed in tin), and vinyl-sided sheds built over a wooden frame. Small sheds may include a wooden or plastic floor, while more permanent ones may be built on a concrete pad or foundation. Sheds may be lockable to deter theft or entry by children, domestic animals, wildlife, etc.

An interlock is a feature that makes the state of two mechanisms or functions mutually dependent. It may consist of any electrical or mechanical devices, or systems. In most applications, an interlock is used to help prevent any damage to the machine or to the operator handling the machine. For example, elevators are equipped with an interlock that prevents the moving elevator from opening its doors and prevents the stationary elevator (with open doors) from moving.

Interlocks may include sophisticated elements such as curtains of infrared beams, photodetectors, simple switches, and locks. It can also be a computer containing an interlocking computer program with digital or analogue electronics.

Zenpokoenfun is an architectural model of Japanese ancient tombs (Kofun), which consists of a square front part (前方部, Zenpō-bu) and a circular back part (後円部, Kōen-bu). The part connecting the two is called the middle part (くびれ部, Kubire-bu), which looks like a keyhole when viewed from above. Therefore, they are also called keyhole-shaped mounds in English, and in Korean, they are called long drum tombs (장고분, Janggobun) due to their resemblance to Janggu, and it is also a form of the Kofun that appeared earlier in the Kofun period along with the enpun [ja] (円墳; lit. circular type). Generally, large Kofun are front and rear circular tombs, widely distributed in Honshu, Shikoku, and Kyushu with Gokishichidō as the center. Among them, the largest front and rear circular tomb in Japan are the Mozu Tombs with a total length of 525 meters. In addition to Japan, there are also the front and rear circular tombs in South Korea, as well as the front and rear circular tombs in Chosan County Ancient Tomb Group and Chasong County Ancient Tomb Group located in North Korea. In addition, Korean archaeologist Jiang Renqiu believes that the Songhe Dong No. 1 Tomb (Wuyishan Mountain Kofun) located in Goseong County, South Gyeongsang Ancient Tomb Group, is the Zenpokoenfun.

Security policy is a definition of what it means to be secure for a system, organization or other entity. For an organization, it addresses the constraints on behavior of its members as well as constraints imposed on adversaries by mechanisms such as doors, locks, keys, and walls. For systems, the security policy addresses constraints on functions and flow among them, constraints on access by external systems and adversaries including programs and access to data by people.

A combination lock is a type of locking device in which a sequence of symbols, usually numbers, is used to open the lock. The sequence may be entered using a single rotating dial which interacts with several discs or cams, by using a set of several rotating discs with inscribed symbols which directly interact with the locking mechanism, or through an electronic or mechanical keypad. Types range from inexpensive three-digit luggage locks to high-security safes. Unlike ordinary padlocks, combination locks do not use keys.

The key, officially referred to as the free throw lane by the National Basketball Association (NBA) (and Euroleague), the National Collegiate Athletic Association (NCAA), the National Association of Intercollegiate Athletics (NAIA), and the National Federation of State High School Associations (NFHS), and the restricted area by the International Basketball Federation (FIBA), also simply called the lane, is a marked area on a basketball court surrounding the basket, where much of the game's action takes place.

It resembles a locksmith's key and consists of what is colloquially known as the circle and the post, also known as the lane or the paint, overlapping at the bottom half of the circle. It can be considered a lane showing the path to the basket, and is usually painted in a distinctive color. The post is bounded by the baseline, the free-throw line, and two lane lines connecting free throw line and baseline.