In the United States, where anthropology was first defined as a discipline, the field is traditionally divided into four sub-fields: cultural anthropology, archaeology, linguistic anthropology, and biological anthropology.

* 1972 – Seventy-four nations sign the Biological Weapons Convention, the first multilateral disarmament treaty banning the production of biological weapons.

During the first Gulf War the United Nations activated a biological and chemical response team, Task Force Scorpio, to respond to any potential use of weapons of mass destruction on civilians.

One significant enhancement in biological weapon development was the first use of anthrax.

Its first modern incidence in biological warfare were when Scandinavian " freedom fighters " supplied by the German General Staff used anthrax with unknown results against the Imperial Russian Army in Finland in 1916.

McCulloch and Pitts developed the first variants of what are now known as artificial neural networks, models of computation inspired by the structure of biological neural networks.

The convention recognized for the first time in international law that the conservation of biological diversity is " a common concern of humankind " and is an integral part of the development process.

The cane toad was first introduced deliberately into the Philippines in 1930 as a biological control agent of pests in sugarcane plantations.

The first of these two methods is more commonly encountered in practice because many industrial systems have many continuous systems components, including mechanical, fluid, biological and analog electrical components, with a few digital controllers.

Researchers have been trying to identify the biological basis of dyslexia since it was first identified by Oswald Berkhan in 1881 and the term dyslexia coined in 1887 by Rudolf Berlin.

( The adjective genetic, derived from the Greek word genesis — γένεσις, " origin ", predates the noun and was first used in a biological sense in 1860.

On 6 February 2009, the U. S. Food and Drug Administration approved the first human biological drug produced from such an animal, a goat.

Some commentators consider him the first to demonstrate the existence of biological stress.

Since it is immiscible with water, the main constituent of biological tissue, water must first be removed in the process of dehydration.

At the age of 23 he learned about his biological parents, contacted his mother, and met her and his then 16 year old sister for the first time.

He was the first to give a biological definition of the term species.

Some mimosas raise their leaves in day and lower them at night, and experiments done by Jacques d ' Ortous de Mairan on mimosas in 1729 provided the first evidence of biological clocks.

They were among the first biological discoveries made after the invention of the microscope.

To protect the country's biological resources, the government has taken a first step of preparing a Biodiversity Action Plan to address conservation of threatened species.

The first phospholipid identified as such in biological tissues was lecithin, or phosphatidylcholine, in the egg yolk, by Theodore Nicolas Gobley, a French chemist and pharmacist, in 1847.

This fact suggests that it should be named Equus burchelli quagga ; however, according to the rules of biological nomenclature, where there are two or more alternative names for a single species, the name first used takes priority.

Before a TARDIS becomes fully functional, it must be primed with the biological imprint of a Time Lord, normally done by simply having a Time Lord operate the TARDIS for the first time.

However, he was one of the first scientists to recognize that the oxygen, nitrogen and carbon dioxide in the Earth's atmosphere result from biological processes.

Y. pestis is potentially one of the first examples of biological warfare in history, when in 1347 plague victims were catapulted by the Mongols over the city walls of Caffa, a town currently known as Feodosiya located in present day Ukraine.

Atomic timekeeping services started experimentally in 1955, using the first caesium atomic clock at the National Physical Laboratory, UK ( NPL ).

The cases were put by the litigants themselves in the form of an exchange of single speeches timed by water clock, first prosecutor then defendant.

He becomes the first person to ever complete the Trinity Great Court Run – running around the college courtyard in the time it takes for the clock to strike 12.

None of the first clocks survived from 13th century Europe, but various mentions in church records reveal some of the early history of the clock.

The first mercury powered automata clock was invented by Ibn Khalaf al-Muradi

* The clock stops after the offense completes a first down and begins again — assuming it is following a play in which the clock would not normally stop — once the referee declares the ball ready for play.

In the NFL the clock does not explicitly stop for a first down.

* In the 2006 season, the game clock was started when the ball was declared ready for play after the defensive team ( during a scrimmage down ) or the kick-receiving team ( during a free kick down ) was awarded a first down ( change of possession ), reducing the time of games.

In the first 27 minutes of a half, the clock stops when:

The clock starts again when the referee determines the ball is ready for scrimmage, except for team time-outs ( where the clock starts at the snap ), after a time count foul ( at the snap ) and kickoffs ( where the clock starts not at the kick but when the ball is first touched after the kick ).

On kickoffs, the clock starts when the ball is first touched after the kick.

The first feedback control device on record is thought to be the ancient Ktesibios's water clock in Alexandria, Egypt around the third century B. C.

The 18th century saw the arrival of some interesting improvements, first by Poleni with the first fully functional calculating clock and four-operation machine, but these machines were almost always one of the kind.

In fact, the first system to clock the ISA bus at 8 MHz was the turbo 8088 clones that clocked the processors at 8 MHz.

The unit was redefined in terms of the tropical year at 1900. 0 instead of the sidereal year ; and the standard second was defined first as 1 / 31556925. 975 of the tropical year at 1900. 0, and then as the slightly modified fraction 1 / 31556925. 9747 instead, finally being redefined in 1967 / 8 in terms of the cesium atomic clock standard ( see below ).

The Navy Research Laboratory continued advancements with their Timation ( Time Navigation ) satellites, first launched in 1967, and with the third one in 1974 carrying the first atomic clock into orbit.

The first version of Microsoft Windows included a simple graphics painting program called Windows Paint ; Windows Write, a simple word processor ; an appointment " calendar "; a " cardfiler "; a " notepad "; a " clock "; a " control panel "; a " computer terminal "; " Clipboard "; and RAM driver.

The i386SL was first available at 20 MHz clock speed, with the 25 MHz model later added.

Harrison built his first longcase clock in 1713, at the age of 20.