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History of Casio Calculators

Casio Computer Co., Ltd. was founded by the four Kashio brothers (Tadao, Toshio, Kazuo, and Yukio) in 1957. That same year, the company, in eﬀorts led by the second-eldest brother Toshio, developed the “14-A,” which was the world’s ﬁrst compact all-electric calculator, meaning that it ran only on electric circuits rather than using gears or motors.

Thereafter, the four brothers combined their respective strengths to grow the business while putting into the practice their ideals of “creativity and contribution.” Counting from the year 1965, the year 2025 marks the 60th anniversary of when the company launched the “001,” the ﬁrst electronic desktop calculator with memory functions.

Let’s look back on this long and storied history.

	001 [World’s First] Onboard Memory Functions This model was the beginning of Casio’s electronic desktop calculator line. Its memory functions made a wide variety of calculations more eﬃcient. The 001 marked the beginning of a new era of calculators.
	101P [World’s First] Onboard Recordkeeping (Printer) Functions The 101P was capable of printing values and the results of calculations onto a roll of paper, allowing users to check the information later or keep records. This contributed greatly to more eﬃcient work operations and accounting.
	FX-1 The First “Scientiﬁc Calculator” This model supported the calculation of 16 types of functions, including trigonometry, logarithms, and cube roots, all accessible from one-touch key operations. The fx-1 was the ﬁrst in Casio’s revolutionary scientiﬁc calculator line.
	Casio Mini [World's First] Personal, Compact Calculator The Casio Mini is notable for changing the concept of a calculator from a piece of oﬃce equipment to an everyday household item. It shocked the industry when it debuted at just one-fourth the size and one-third the price (at ¥12,800 [JPY]) of the mainstream models of the time.
	JS-20 Origin of the Standard Business Calculator Series The JS-20 was a solar-powered model at the perfect size for use either on a desktop or in the hands. Its design focused extensively on ease of use and practicality, and contained a wide variety of calculator functions required for business.
	SL-800 World’s Thinnest Calculator in a Credit Card Size Using a ﬁlm-like approach to the electronic components, the SL-800 achieved a thickness of just 0.8 mm and a weight of 12 grams. This model combined the imagination and technical skills of Japan and was considered to be the ultimate in portable calculators.
	FX-7000G [World’s First] Calculator with Onboard Graphing Functions The fx-7000G made it easy to display graphs merely by entering a formula, where graphs previously had to be drawn by hand. This model contributed to mathematics education in the United States.
	Origin of the ClassWiz − EX Series − Country-Speciﬁc and Language-Related Functionality The ClassWiz Series aligned with the school curricula in various countries via changes in functionality and language according to the country of use. This series is a collection of standard scientiﬁc calculators.
	S100X Reliability That Comes from Being Made in Japan The S100X was designed as the flagship Casio calculator, favourably combining technology and the company’s reputation in a high-quality and easy-to-use model. It has been a popular option as a gift.
	Ergonomic Calculators Pursuit of Ergonomics in Calculator Design The Ergonomic Calculators were created in consideration of ergonomic principles for the vertical pressing of the keys, with the calculator’s operable surface slanting at an incline of three degrees to align with the shape of the hand. With this design, the Ergonomic Calculators indeed oﬀer a new “angle” in its approach to the pressing of keys.