2B1 Oka

2B1 Oka (Russian: 2Б1 Ока) is a Soviet 420 mm self-propelled gun. 2B1 is its GRAU designation.

An experimental model was ready in 1957. Its chassis (Object 273), was designed and built by the Kirov Plant. Its 20 meter barrel allowed it to fire 750 kg rounds up to 45 km. Due to its complexity of loading it had a relatively low rate of fire—one round every five minutes. Field tests showed various drawbacks of the entire design (the recoil was too strong for many components: it damaged drive sprockets, tore the gear-box away from its mountings, etc.) and the sheer length rendered it incredibly difficult to transport.

Its development continued until 1960, when the idea of such overpowered guns (along with the 2A3), was abandoned in favor of tactical ballistic missiles, such as the 2K6 Luna.

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Oka

Oka or OKA may refer to:

Cars

Military

Places

Čoka

Čoka (Serbian Cyrillic: Чока, pronounced [t͡ʃôka]; Hungarian: Csóka, pronounced [ˈt͡ʃoːkɒ]; German: Tschoka; Slovak: Čoka) is a town and municipality in the North Banat District of Vojvodina, Serbia. The town has a population of 4,028, while Čoka municipality has 11,398 inhabitants.

History

The first written record about Čoka was made in 1247. It was part of a feudal tenure of which landowners were often changed. Later the settlement was abandoned due to the dense Cuman incursions at the end of the 13th century, but it was rebuilt again in the 14th century. In 1552, it was under Ottoman administration. At that time, it had a sparse population of 13 people, and at the end of the 16th century, the hamlet dwellers numbered 4 Serb families.

In the first half of the 18th century, the Ottoman administration was replaced by the Habsburg one and according to 1717 data, there were 40 Serb houses in the village of which number increased to 192 until the middle of the 18th century, and in 1787, the number of population increased to 1,191 people. In 1796, the tenure owner Lőrinc Marcibányi had Hungarians settled here that Slovaks followed then., which resulted in a rapid population growth and as early as the middle of the 19th century, the population numbered 2,739 people which increased to 4,239 until 1910. According to 1910 census, Hungarians were the dominant ethnic group in the village, while there existed a sizable ethnic Serb community as well.

Ōoka

Ōoka or Ooka (大岡（おおおか）, Ōoka, "large hill") may refer to:

Location

Surname

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OLPC XO

The OLPC XO, previously known as the $100 Laptop,Children's Machine, and 2B1, is an inexpensive laptop computer intended to be distributed to children in developing countries around the world, to provide them with access to knowledge, and opportunities to "explore, experiment and express themselves" (constructionist learning). The laptop is manufactured by Quanta Computer and developed by One Laptop per Child (OLPC), a non-profit 501(c)(3) organization.

The subnotebooks are designed for sale to government-education systems which then give each primary school child their own laptop. Pricing was set to start at $188 in 2006, with a stated goal to reach the $100 mark in 2008 and the 50-dollar mark by 2010. When offered for sale in the Give One Get One campaigns of Q4 2006 and Q4 2007, the laptop was sold at $199.

These rugged, low-power computers use flash memory instead of a hard drive, and come with an operating system derived from Fedora Linux as their pre-installed operating system with the Sugar GUI.Mobile ad hoc networking via 802.11s WiFi mesh networking is used to allow many machines to share Internet access as long as at least one of them can see and connect to a router or other access point.