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MeasuringWorth is a free online service to calculate relative economic value over time using price indexes. It has data sets, charts, and comparators for prices in several currencies and economic time series for stock markets and the price of gold. The site's comparisons over time were used in over 200 academic works each year in 2018 and 2019. [1]
The Little Professor was first released by Texas Instruments on June 13, 1976. [5] As the first electronic educational toy, [6] [7] the Little Professor is a common item on calculator collectors' lists. [8] In 1976, the Little Professor cost less than $20. More than 1 million units sold in 1977. [9]
A partially disassembled Curta calculator, showing the digit slides and the stepped drum behind them Curta Type I calculator, top view Curta Type I calculator, bottom view. The Curta is a hand-held mechanical calculator designed by Curt Herzstark. [1] It is known for its extremely compact design: a small cylinder that fits in the palm of the hand.
American Girl dolls were a cult-like phenomenon that seemed inescapable for any child of the '90s. In 1986, the first three dolls hit the market – Molly McIntire, Kirsten Larson and Samantha ...
The idea for the skirt began as Charlot needed a last-minute Christmas skirt. With little money and little ability to sew, she made the seamless skirt herself out of felt. [3] As Charlot's design for a skirt caught on, she was asked to make a dog-themed skirt, as dogs were popular.
The rah-rah (or ra-ra) skirt is a short flounced layered skirt that originated in cheerleading and became a popular fashion trend among teenage girls in the early 1980s. As such it marked, as the Oxford Dictionary noted, the first successful attempt to revive the miniskirt that had been introduced in the mid-1960s. [ 1 ]
The pleated tartan skirt began as a component of girls' school uniforms in the early twentieth century in the United Kingdom. [33] Most UK schools now allow girls to wear trousers, but many girls still wear skirts in primary and secondary schools, even where the choice of trousers is given.
By 1970, a calculator could be made using just a few chips of low power consumption, allowing portable models powered from rechargeable batteries. The first handheld calculator was a 1967 prototype called Cal Tech, whose development was led by Jack Kilby at Texas Instruments in a research project to produce a portable calculator. It could add ...