online calculator History of Calculators 1. Ancient Calculating Tools Abacus (c. 2300 BCE – Mesopotamia, China): One of the earliest counting tools. Used sliding beads to perform addition, subtraction, and even multiplication/division. 2. Mechanical Calculators 17th Century: Wilhelm Schickard (1623) – Designed the first known mechanical calculator. Blaise Pascal (1642) – Invented the "Pascaline", a gear-based calculator. Gottfried Leibniz (1673) – Introduced a step reckoner that could multiply and divide. 19th Century: Charles Babbage – Designed the "Analytical Engine" (not completed) – the foundation of modern computing. Scheutz Difference Engine – A mechanical calculator that could solve polynomial equations. 3. Electromechanical Calculators (1930s–1950s) Used motors and electrical components. Examples: Monroe and Marchant calculators. Still bulky, but faster and more accurate than purely mechanical ones. 4. Electronic Calculators (1960s–1970s) Replaced mechanical parts with transistors and ICs (integrated circuits). First all-electronic calculator: Bell Punch's ANITA (1961). HP-35 (1972): First handheld scientific calculator by Hewlett-Packard. Rapid miniaturization led to pocket calculators. 5. Solar & Programmable Calculators (1980s–1990s) Casio, Texas Instruments, and Sharp led the market. Introduced features like graphing, programming, and statistical functions. Used in schools, businesses, and engineering. 6. Online Calculators & Apps (2000s–Today) With the internet and smartphones, calculators became digital apps and online tools. Types: Basic, scientific, financial, health, date, unit converters, etc. Popular platforms: Google calculator (search bar) Calculator apps (iOS, Android) Websites like Desmos (graphing), WolframAlpha, and Symbolab ๐ Summary ๐งฎ Abacus → ⚙️ Mechanical → ๐ Electronic → ๐ฑ Online & Mobile Calculators evolved from simple bead counters to smart apps that solve complex equations and visualize data. TAGS algebra calculator geometry calculator trigonometry calculator percentage calculator square root calculator fraction calculator equation solver free calculator simple calculator scientific calculator math calculator calculator tool fast calculator basic calculator EMI calculator loan calculator mortgage calculator interest calculator SIP calculator tax calculator income tax calculator GST calculator BMI calculator calorie calculator BMR calculator pregnancy calculator ideal weight calculator BMI calculator calorie calculator BMR calculator pregnancy calculator ideal weight calculator calculate online quick calculator tool mobile-friendly calculator calculator for students accurate calculator instant calculation no download calculator online calculator, scientific calculator, free math tool, basic calculator, algebra calculator, fast calculator app
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