Class of service (COS or CoS) is a parameter used in data and voice protocols to differentiate the types of payloads contained in the packet being transmitted...

Service class people (Russian: служилые люди, romanized: sluzhilyye lyudi) were a class of free people in the Tsardom of Russia in the 14th to the 17th...

The list of submarine classes in service includes all submarine classes currently in service with navies or other armed forces worldwide. For surface...

Multimedia Class Scheduler Service (MMCSS) is a Windows service that allows multimedia applications to get prioritized access to CPU for time-sensitive...

The class A television service is a system for regulating some low-power television (LPTV) stations in the United States. Class A stations are denoted...

The list of naval ship classes in service includes all combatant surface classes in service currently with navies or armed forces and auxiliaries in the...

intermediate level of service between economy class and first class, but many airlines now offer business class as the highest level of service, having eliminated...

Retrieved 2019-05-29. "First-Class Mail". USPS. Archived from the original on 2011-10-15. Retrieved 2009-01-09. "Postal service cuts mean slower mail in 2012"...

The list of destroyer classes in service includes all those currently with navies or armed forces and auxiliaries in the world. Ships are grouped by type...

offer this class of service. In some countries, this class has emerged as a response from governments and companies requiring economy class for travel...

Quality of service (QoS) is the description or measurement of the overall performance of a service, such as a telephony or computer network, or a cloud...

redefinition of the ToS field (as well as the Traffic Class field in IPv6 packets) splits this byte into a 6-bit Differentiated Services (DS) field and...

The list of corvette classes in service includes all those currently with navies or armed forces and auxiliaries in the world. Ships are grouped by type...

The Selective Service System (SSS) is an independent agency of the United States government that maintains a database of registered male U.S. citizens...

economy class. Originally all planes offered only one class of service (often equivalent to the modern business or economy class), with a second class appearing...

The Astute class is the latest class of nuclear-powered fleet submarines (SSNs) in service with the Royal Navy. The boats are being constructed by BAE...

The Skipjack class was a class of United States Navy nuclear submarines (SSNs) that entered service in 1959-61. This class was named after its lead boat...

The list of cruiser classes in service includes all those currently with navies or armed forces and auxiliaries in the world. Ships are grouped by type...

economy class. In India, the lowest class of service was branded third class under the British colonial rule. It was re-branded as second class following...

The list of frigate classes in service includes all those currently with navies or armed forces and auxiliaries in the world. Ships are grouped by type...

technology. Domestic Air Mail, as a class of service, officially ended May 1, 1977. By then, all domestic First Class Mail was being dispatched by the most...

Huitfeldt class is a three-ship class of air defence frigates that entered service with the Royal Danish Navy in 2012 and 2013. The class is built on...

Oste class are purpose built signals intelligence (SIGINT/ELINT) and reconnaissance ships of the German Navy. Officially designated as "fleet service ships"...

First class is the most luxurious and most expensive travel class of seats and service on a train, passenger ship, airplane, bus, or other system of transport...

The second ship of the class, John F. Kennedy (CVN-79), is scheduled to enter service in 2025. Carriers of the Gerald R. Ford class have: Advanced Arresting...

the passenger ship trade, ocean liners had classes of service, often categorized as First Class, Second Class, and Steerage. Companies such as Cunard Line...

work continues as of 2023. The Project 949 submarines were the largest cruise missile submarines in service until some Ohio-class ballistic missile submarines...

Submarine Service of the British Royal Navy. The boats were originally named the Upholder class, after the most renowned vessel of the former U class. Their...

The list of aircraft carrier classes in service includes all those currently with navies or armed forces and auxiliaries in the world. Ships are grouped...

The Seawolf class is a class of nuclear-powered, fast attack submarines (SSN) in service with the United States Navy. The class was the intended successor...