* 1920 – Telecommunications: the first transatlantic two-way radio broadcast takes place.

In early 1949, the first American transcontinental two-way RTTY QSO was accomplished on 11 meters using AFSK between Tom McMullen ( W1QVF ) operating at W1AW and Johnny Agalsoff, W6PSW.

For example, the first recorded USA to New Zealand two-way RTTY QSO took place in 1956 between W0BP and ZL1WB.

Total two-way trade in January 1998 exceeded that for all of 1978 ; in the first quarter of 2009, trade exceeded the full-year 1998 level.

In 1974 the first realtime two-way LPC packet speech communication was accomplished over the ARPANET at 3500 bit / s between Culler-Harrison and Lincoln Laboratories.

Notable sites encompassed by the CCNS include Marconi Station, site of the first two-way transatlantic radio transmission, and the Highlands Center for the Arts, formerly the North Truro Air Force Station.

Carrier squelch was invented first and is still in wide use in two-way / three-way radio, especially in the amateur radio world.

The first two-way communications between North American and Hawaiian amateurs began in 1922 at 200 meters.

Goring's is often called the " final piece of the puzzle ": a strong two-way player, his presence on the second line ensured that opponents would no longer be able to focus their defensive efforts on the Islanders ' first line of Bossy, Trottier and Clark Gillies.

In August 1963, President John F. Kennedy in Washington, D. C., telephoned Nigerian Prime Minister Abubakar Balewa aboard USNS Kingsport docked in Lagos Harbor ; the first live two-way call between heads of government by satellite.

It was decided to try to establish a transatlantic radiotelegraph service, and, in January, 1906, employing his rotary-spark transmitters, Fessenden made the first successful two-way transatlantic transmission, exchanging Morse code messages between a station constructed at Brant Rock and an identical one built at Machrihanish, Scotland.

Nickelodeon's pre-history began on December 1, 1977 when QUBE, the first two-way interactive cable TV system was launched in Columbus, Ohio by Warner Cable ( owned by Warner Communications, and an ancestor of Warner-Amex Satellite Entertainment ).

The cosmonauts spent time in two-way TV links with their families, watched the World Cup football game, played chess ( including this chess game with the crew as white ; it was the first chess game played across space ) with ground control, and voted in a Soviet election.

The first phase of two-way traffic was completed in 2009, with St. Paul Street and King Street being converted first.

А group is assigned the task of re-creating on paper a set of rectangular figures, first as they are described by the leader under one-way conditions, and second as they are described by the leader under two-way conditions.

The first two-way communications between North American and Hawaiian amateurs began in 1922 at 200 meters.

The first is as a warning system, typically on two-way catalytic converters such as are still sometimes used on LPG forklifts.

This was the first in-flight trial of two-way communication between the missile and aircraft and was an important step in clearing the aircraft and missile for the ALD firings which had slipped into Spring 2006, due to the lack of winter daylight hours at the Vidsel Test Range in northern Sweden.

In 1973 the MCM ( Manual Communications Module ), which was the world's first electronic portable TTY allowing two-way telecommunications, premiered at the California Association of the Deaf convention in Sacramento, California.

The new two-way route incorporates the first shared space scheme in the country.

* July 25-The first transatlantic two-way radio broadcast is made.

In 1923 a two-way contact between Connecticut and France bridged the Atlantic Ocean for the first time.

However, Chára grew in ways that exceeded all expectations in his first year in Ottawa, recording new career highs in goals ( 10 ) and points ( 23 ) as he turned into a bona fide two-way defenseman during 2001 – 02.

An early pioneer of radio astronomy was Grote Reber, an amateur astronomer who constructed the first purpose built radio telescope in the late 1930s to follow up on the discovery of radio wavelength emissions from space by Karl Jansky.

Alumni was the most successful team in the amateur era of Argentine football, winning 10 of the 14 league championships contested, being considered the first great football team.

After what the MCC saw as the problems of the earlier professional and amateur series they decided to take control of organising tours themselves, and this led to the first MCC tour of Australia in 1903 – 04.

W7ASU is an amateur radio station that was first organized in 1935.

In its 12-year history as an amateur league, the Brooklyn Atlantics won seven championships, establishing themselves as the first true dynasty in the sport, although, the New York Mutuals were widely considered to be one of the best teams of the era as well.

The first climber to actually make bouldering his primary specialty ( in the mid 1950s ) and to advocate its acceptance as a legitimate sport not restricted to a particular area was John Gill, a mathematician and amateur gymnast who found the challenge and movement of bouldering enjoyable.

In 1992 they sponsored the British Steel Challenge, the first of a series of ' wrong way ' races for amateur crews.

He removed the club's Chelsea pensioner crest, improved the youth set-up and training regime, rebuilt the side with shrewd signings from the lower divisions and amateur leagues, and led Chelsea to their first major trophy success – the League championship – in 1954 – 55.

The first amateur railway detective, Thorpe Hazell, was created by Victor Whitechurch and his stories impressed Ellery Queen and Dorothy L. Sayers.

" He held an amateur rider's licence and rode in his first race at Newbury for trainer Toby Balding.

In this context the term " professional " ( used for the first category ) as opposed to " amateur " ( used for the second and third ) refers only to the professionalism of the used medium, and not to the professionalism of the language itself or its creator.

In the book The Wild Frontier: Atrocities during the American-Indian War from Jamestown Colony to Wounded Knee, amateur historian William M. Osborn sought to tally every recorded atrocity in the area that would eventually become the continental United States, from first contact ( 1511 ) to the closing of the frontier ( 1890 ), and determined that 7, 193 people died from atrocities perpetrated by whites, and 9, 156 people died from atrocities perpetrated by Native Americans.

It was named after the amateur radio callsign of Phil Karn, who first wrote the software for a CP / M system and then ported it to DOS on the IBM PC.

This was the first attempt to establish ' amateur ' microscopy as a serious subject in the then-emerging new media of the Internet.

Hornby Railways produce live steam locomotives in 00, based on designs first arrived at by an amateur modeller.

The paradox is commonly attributed to the German amateur astronomer Heinrich Wilhelm Olbers, who described it in 1823, but Harrison shows convincingly that Olbers was far from the first to pose the problem, nor was his thinking about it particularly valuable.

In addition to the numerous fans who have started or joined punk bands, audience members also become important participants via the scene's many amateur periodicals — in England, according to Laing, punk " was the first musical genre to spawn fanzines in any significant numbers ".

Charles Cros, a French poet and amateur scientist, is the first person known to have made the conceptual leaps from recording sound as a traced line to the theoretical possibility of reproducing the sound from the tracing and then to a definite method for accomplishing the reproduction.

Historically an amateur sport, in 1995 the International Rugby Board ( IRB ) removed restrictions on payments to players, making the game openly professional at the highest level for the first time.

Radio amateur message relay operations were originally conducted using Morse code in the first two decades of the 20th century using spark-gap transmitters.

This grass-roots alliance of amateur and professional radio astronomers is headed by executive director emeritus Prof. H. Paul Shuch, the engineer credited with developing the world's first commercial home satellite TV receiver.

The first rally was an amateur competition and it took place in 1974.

It is thought that the first example of a working model tramcar in the UK built by an amateur for fun was in 1929, when Frank E. Wilson created a replica of London County Council Tramways E class car 444 in 1: 16 scale, which he demonstrated at an early Model Engineer Exhibition.

Two rival tours were vying to become the first official test tour, with James Lillywhite campaigning for a professional tour and Fred Grace for an amateur one.