Electronic music was once associated almost exclusively with Western art music but from the late 1960s on the availability of affordable music technology meant that music produced using electronic means became increasingly common in the popular domain.

Since the 1960s rather complex mathematical models have been developed, facilitated by the availability of high speed computers.

The population of polar bears are locally recovering from the major culls of the 1960s and 1970s that came about due to the availability of snow scooters ; however, the Polar bear remains threatened at a global level, due to unsustainable levels of killing by humans and due to marine water pollution.

The Pill became available free of charge on the National Health Service in the 1960s, at first restricted to married women, but early in the 1970s its availability was extended to all women.

Since the early 1960s, with the availability of oracles for certain combinatorial games, also called tablebases ( e. g. for 3x3-chess ) with any beginning configuration, small-board dots-and-boxes, small-board-hex, and certain endgames in chess, dots-and-boxes, and hex ; a new area for data mining has been opened.

Audio amplifiers based on transistors became practical with the wide availability of inexpensive transistors in the late 1960s.

The 3-minute single remained the standard into the 1960s when the availability of microgroove recording and improved mastering techniques enabled recording artists to increase the duration of their recordings.

These were sufficient weapons but by the late 1960s, the U. S. Navy recognized that reaction time, firepower, and operational availability in all environments did not match the anti-ship missile threat.

Hampered by limited availability in and after the war years, by the 1960s Schenkerian analysis had begun to attract renewed interest, and by the 1980s it had become one of the main analytical methods used by many North American music theorists.

While the basic principles of shaping aircraft to avoid detection were known at least since the 1960s, it was not until the availability of supercomputers that shape computations could be performed from every angle, a complex task.

One was to expand the season, which even by the early 1960s was as limited as it was in Merola's time, running from Labor Day to the opening of the Metropolitan Opera in order to capitalize on the availability of singers by presenting up to fourteen operas with two or three performances each.

The Haight-Ashbury's elaborately detailed, 19th century multi-story wooden houses became a haven for hippies during the 1960s, due to the availability of cheap rooms and vacant properties for rent or sale in the district ; property values had dropped in part because of the proposed freeway.

In the 1960s and 1970s, with the availability of deep frozen goods, the concept of fast food arrived together with an interest in Mediterranean dishes as Danes travelled more widely.

This method started to become more common in the 1960s with the more widespread availability of fully waterproof glues such as resorcinal ( red glue ) and then epoxy resin.

The number of artists who stained in the 1960s greatly increased with the availability of acrylic paint.

In North American and European societies, the 1960s saw the beginning of the " sexual revolution ," characterized by increased public interest and discussion about sexuality, recognition of the value of sexuality in people's lives, the separation of sexuality from reproduction by increasing availability of contraception, the lessening of many social barriers and inhibitions related to sexual behavior, and social acknowledgment of women's sexuality.

The increasing availability of television and motor cars in the late 1950s and early 1960s offered the public significant entertainment alternatives.

Shepherd-Barron joined De La Rue Instruments in the 1960s and came up with the concept of a self-service machine which would dispense paper currency with 24 / 7 availability.

This prosperity started to fade in the 1960s with the increasing availability of foreign holidays to the general public.

It became popular for use with technical illustrations in the 1960s and was a favourite of graphic designers by the early seventies, its uses ranging from publicity and publication design to packaging, largely because of its availability as a Letraset typeface.

The ready availability of jobs in the growing federal government attracted many to Washington in the 1960s, and middle class African-American neighborhoods prospered.

Instead, the price of cells was determined largely by the semiconductor industry ; their move to integrated circuits in the 1960s led to the availability of larger boules at lower relative prices.

Countdown sought to benefit from the closure of TV21, and the consequent availability of the licence to publish strips based on the 1960s Gerry Anderson puppet shows, which had been popular for many years on television.

Magnetic core memory would become the dominant form of memory until the development of transistor-based memory in the late 1960s.

By the 1960s and 1970s, semiconductor transistor-based amplifiers began to become more popular because they are less expensive, lighter-weight, and require less maintenance.

However, the equipment – which was mainly Soviet weaponry from the 1960s and 1970s – was outdated and it proved inefficient during the 1986 bombing of Libya by the US Air Force.

They feature excellent VHF and UHF performance plus low noise figures, and were widely used throughout the 1960s in television sets ( beginning with RCA's " New Vista " line of color sets in 1961 with the CTC-11 chassis ) and radio equipment and high-fidelity equipment, primarily in RF sections.

Growth in telecommunications halted with the general economic collapse after the Great Leap Forward ( 1958 – 60 ) but revived in the 1960s after the telephone network was expanded and improved equipment was introduced, including imports of Western plants and equipment.

Amateur Radio operators used various equipment designs to get on the air using RTTY in the 1950s and 1960s.

As a result, by the mid-1990s, amateur use of actual Teletype machines had waned, though a core of " purists " still operate on equipment originally manufactured in the 1940s, 1950s, 1960s and 1970s, a testament to the workmanship and durability of this equipment.

Many 1950s and 1960s war films, including the Oscar-winning films Patton, Lawrence of Arabia, and Spartacus, were shot in Spain, which had large supplies of both Allied and Axis equipment.

While the first serious attempts to quantify fish biomass were conducted in the 1960s, major advances in equipment and techniques took place at hydropower dams during the 1980s.

In electrical equipment manufacturing in the USA, Aroclor 1260 and Aroclor 1254 were the main mixtures used before 1950 ; Aroclor 1242 was the main mixture used in the 1950s and 1960s until it was phased out in 1971 and replaced by Aroclor 1016.

Manufacture peaked in the 1960s, by which time the electrical industry had lobbied the U. S. Congress to make them mandatory safety equipment.

In some ways GE is the opposite of the " typical " 1960s conglomerate in that the company was not highly leveraged, and when interest rates went up they were able to turn this to their advantage, as it was often less expensive to lease from GE than buy new equipment using loans.

Larger, hand held, high speed electric wrap guns replaced soldering in the late 1960s for permanent wiring, when installing exchange equipment.

While the term was used in the early 1960s and 70s in the US to refer to value-added resellers, OEM is currently defined by IBM to refer to " a manufacturer of equipment that may be marketed by another manufacturer ".

In the 1960s, tape players using reel-to-reel equipment, 8-track cartridges in the late 60s and early 70s.

High climbers and whistle punks were both phased out in the 1960s to early 1970s when portable steel towers replaced spar trees and radio equipment replaced steam whistles for communication.

Increased standards and improved equipment meant that climbs graded 5. 9 in the 1960s are now only of moderate difficulty.

Homerton's links with popular music continued with the arrival of Toerag, an eight track recording studio which uses reclaimed 1960s analogue equipment, where notably the White Stripes ' acclaimed 2003 album Elephant was produced.

From the 1960s through the 1980s, Tualatin was the home of Sunn Musical Equipment Company, a manufacturer of musical and sound reinforcement equipment.

During the second half of the 1960s several extensions, equipment upgrades like a VHF omnidirectional range ( VOR ) and an instrument landing system ( ILS ) as well as new buildings were constructed.

Each of the four episode features some of the most notable air, sea and land vehicles & equipment of the 1930s, 1950s, 1960s & 1980s respectively.

It was created in the late 1960s for use with automated test equipment, and is still in use for that purpose.

* Market division and price-fixing among manufacturers of heavy electrical equipment in the 1960s, including General Electric.