The Blackberry is a handheld wireless Personal Data Assistant (PDA) and communication device.
History Explorer Results (148)
Related Books (72)
Grade Range:
K-12
Resource Type(s):
Artifacts, Primary Sources
Date Posted:
11/6/2008
Declaring the distances to such places as Boston, San Francisco, and Toledo, this sign post graced the set of M*A*S*H during the show's run. Set in Korea during the 1950s, the show revolved around the work and antics of the staff of a Mobile Army Surgical Hospital (MASH). Its final episo
Grade Range:
K-12
Resource Type(s):
Artifacts, Primary Sources
Date Posted:
11/6/2008
The Global Positioning System (GPS) consists of NAVSTAR satellites in earth orbit that send signals to receivers on land, sea, or in the air. The system became operational in 1978. Its military usefulness was demonstrated during Operation Desert Storm (1991), when coalition troops with receivers
Grade Range:
K-12
Resource Type(s):
Artifacts, Primary Sources
Date Posted:
11/6/2008
On a Sunday morning in December 1941, a chaplain had his most difficult assignment — to say a prayer to sailors aboard a U.S. navy ship actively under low–flying attack by the enemy firing from all directions. He quickly realized the best he could do was walk the ammunition line saying, “Pr
Grade Range:
K-12
Resource Type(s):
Artifacts, Primary Sources
Date Posted:
11/6/2008
During World War I, machine guns were heavy, crew-served weapons. Their operation required several soldiers. Even so-called light machine guns could not easily be handled by single soldiers. To meet the need for an individual rapid-fire weapon, several inventors devised submachine guns. Light eno
Grade Range:
K-12
Resource Type(s):
Artifacts, Primary Sources
Date Posted:
11/5/2008
From the 1920s, psychologists have explored ways to automate teaching. In the 1950s, the psychologist B. F. Skinner of Harvard University suggested that techniques he had developed for training rats and pigeons might be adopted for teaching humans.
Grade Range:
K-12
Resource Type(s):
Artifacts, Primary Sources
Date Posted:
11/4/2008
Life on America's farms in the 1920s and 1930s meant hard work and frugal habits. Farm families were used to "making do" with what they had, wasting nothing that could be recycled or reused. With feed sacks and flour bags, farmwomen took thriftiness to new heights of creativity, transforming the
Grade Range:
K-12
Resource Type(s):
Artifacts, Primary Sources
Date Posted:
11/4/2008
After graduating from the University of Wisconsin, Charles W. Hart and Charles H. Parr developed a two-cylinder gasoline engine and set up their business in Charles City, Iowa. In 1903 the firm built fifteen tractors (a term coined by Hart and Parr), and the 14,000 pound #3 is the oldest survivin
Grade Range:
K-12
Resource Type(s):
Artifacts, Primary Sources
Date Posted:
11/4/2008
The John Deere Model D tractor was introduced in 1923 and became the first tractor built, marketed, and named John Deere. It replaced the Waterloo Boy in the company's product line.
Grade Range:
K-12
Resource Type(s):
Artifacts, Primary Sources
Date Posted:
11/4/2008
When the Depression and resulting banking crisis hit their community, the residents of the coastal town of Pismo Beach, California picked an unusual but logical medium of exchange. Perhaps with tongue in cheek, the merchants and officials of Pismo Beach decided to make the best of a bad situation
Grade Range:
6-12
Resource Type(s):
Artifacts, Primary Sources
Date Posted:
10/27/2008
This is an anatomical model of a woman, complete with removable parts. The kit includes a clear plastic body or shell, a "complete" skeleton, "all vital organs," and a round plastic display stand. The kit was designed as an educational tool to teach basic anatomy. The intructions explain how to a
