Office supplies are all the supplies regularly used in offices by businesses and other organizations. It includes small, expendable, daily use items such as paper clips, post-it notes, and staples, small machines such as hole punches, binders, staplers and laminators, writing utensils and paper, but also encompasses higher-cost equipment like computers, printers, fax machines, photocopiers and cash registers, as well as office furniture such as chairs, cubicles, filing cabinet, and armoire desks. Two very common]citation needed[ medium-to-high-cost office equipment items before the advent of suitably priced word processing machines and PCs in the 1970s and 1980s were typewriters and adding machines.
Many businesses in the office supply industry have recently expanded into related markets]citation needed[ for businesses like copy centers, which facilitate the creation and printing of business collateral such as business cards and stationery, plus printing and binding of high quality, high volume business and engineering documents. Some businesses also provide services for shipping, including packaging and bulk mailing. In addition, many retail chains sell related supplies beyond businesses and regularly market their stores as a center for school supplies with August and early September being a major retail period for Back to school sales.
An assault gun is a gun or howitzer mounted on a motor vehicle or armored chassis, designed for use in the direct fire role in support of infantry when attacking other infantry or fortified positions. The term is a literal translation of the German word "Sturmgeschütz". Germany introduced the first purpose-built assault gun, the Stug III, in the late 1930s thus establishing this category of armoured vehicles.
Historically the custom-built fully armored assault guns usually mounted the gun or howitzer in a fully enclosed casemate on a tank chassis. The use of a casemate instead of a gun turret limited these weapons field of fire, but allowed a larger gun to be fitted relative to the chassis, more armor to be fitted for the same weight, and provided a cheaper construction. In most cases, these turretless vehicles also presented a lower profile as a target for the enemy.
The ISU-122 (Istrebitelnaja Samokhodnaya Ustanovka 122) was a Soviet self-propelled gun used during World War II.
ISU-152 was a Soviet multirole fully enclosed and armored assault gun or armored self-propelled gun, also capable of serving as a heavy tank destroyer developed and used during World War II, with a subsequent use, mainly in the Soviet military, until the 1970s.
Self-propelled artillery (also called mobile artillery or locomotive artillery) is artillery equipped with an own propel system to move towards its target. Within the term are covered self-propelled guns (or howitzers) and rocket artillery. They are high mobility vehicles, usually based on caterpillar track carrying either a large howitzer or other field gun or alternatively a mortar or some form of rocket or missile launcher. They are usually used for long-range indirect bombardment support on the battlefield.
In the past, self-propelled artillery has included direct-fire vehicles such as assault guns and tank destroyers. These have been heavily armoured vehicles, the former providing close fire-support for infantry and the latter acting as specialized anti-tank vehicles.