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Path-ordering. In theoretical physics, path-ordering is the procedure (or a meta-operator ) that orders a product of operators according to the value of a chosen parameter : Here p is a permutation that orders the parameters by value: For example:
E-procurement ( electronic procurement, sometimes also known as supplier exchange) is the business-to-business or business-to-consumer or business-to-government purchase and sale of supplies, work, and services through the Internet as well as other information and networking systems, such as electronic data interchange and enterprise resource ...
Normal order. In quantum field theory a product of quantum fields, or equivalently their creation and annihilation operators, is usually said to be normal ordered (also called Wick order) when all creation operators are to the left of all annihilation operators in the product. The process of putting a product into normal order is called normal ...
Inter-dealer broker. An Inter-dealer broker (IDB) is specialist financial intermediary that facilitates transactions between broker-dealers, dealer banks and other financial institutions rather than private individuals. IDBs act as intermediaries in the financial markets working to facilitate transactions between broker/dealers and dealer banks ...
Mail order. Mail order is the buying of goods or services by mail delivery. The buyer places an order for the desired products with the merchant through some remote methods such as: Then, the products are delivered to the customer. The products are usually delivered directly to an address supplied by the customer, such as a home address, but ...
Early computing. The PLATO system was launched in 1960 at the University of Illinois and subsequently commercially marketed by Control Data Corporation.It offered early forms of social media features with innovations such as Notes, PLATO's message-forum application; TERM-talk, its instant-messaging feature; Talkomatic, perhaps the first online chat room; News Report, a crowdsourced online ...
Mobile app development is the act or process by which a mobile app is developed for one or more mobile devices, which can include personal digital assistants (PDA), enterprise digital assistants (EDA), or mobile phones. [1] Such software applications are specifically designed to run on mobile devices, taking numerous hardware constraints into ...
The word "lol" sent via iMessage. Text messaging, or texting, is the act of composing and sending electronic messages, typically consisting of alphabetic and numeric characters, between two or more users of mobile devices, desktops / laptops, or another type of compatible computer. Text messages may be sent over a cellular network or may also ...