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An innovative RPN and stack-calculator with keyboard input (as packaged app) Since 2016 no new versions as Chrome Packaged App. Please use Mouseless Stack-Calculator Extension or the free desktop app (available on www.stack-calculator.com). Mouseless Stack-Calculator is a innovative calculator and currency converter with fast keyboard entry. It has two modes: an RPN-mode and a stack-mode. The well known RPN stands for Reverse Polish Notation and it saves you time as it avoids the use of parenthesis. The only catch is that the entry of data is a bit different to what most people expect, so you have to learn to work with it. The stack-mode of this calculator is new. It's a bit similar to RPN in the way that is also uses a stack an avoids the use of parenthesis. But it's unique in the way that it has no reveresed data entry but follows the 'normal' sequence. All calculations can be done by use of the keyboard, so no time consuming mouse clicks. Mouse Stack-Calculator is available as Chrome extension, as Chrome packaged app, as desktop app and can run in a webbrowser window. Main features - Flexible and intuitive user interface - Complete insight in entered expression - All the advantages of RPN in RPN-mode - Keyboard for all data entry (as you would expect from a calculator) - Most frequent used instructions only need 1 key; other instructions 2 keys - Integrated currency converter with actual rates - Arbitrary-precision decimal representation (no rounding errors) - Multi-level undo - Flexible number notation: normal, financial, scientific, engineering, h:m:s, h:m, hexadecimal, octal, binary - 30 last answers - 30 memories to store intermediate results - Stack and memory are saved on your computer for future use - Copy results to clipboard for use in other programs - Mathematical calculations - Works with hours (or degrees), minutes, seconds - Statistical and probability calculations - Financial calculations like CAGR, Annuity and CashFlow - Physical constants and conversions Change history Version 0.810 - Fixed minor bugs - Desktop version (based on NodeWebkit) added - Version 5.01 of decimal.js included - Option to display, enter and calculate hexadecimal, octal and binary numbers Version 0.800 - Integration of decimal.js that provides arbitrary-precision decimal representation (thanks to MikeMcl) - Stopped using cookies, now uses local storage (as web-application) and chrome storage (as chrome extension and app) Version 0.724 - Restricted permissions to access only ECB data (currency rates) Version 0.723 - Added compatibility to work as Chrome extension, as packaged app and in webbrowser - Minor bugs Version 0.710 - Exchange rates added - Prefixes added to engineering notation - Uppercase input converted to lowercase - Improved conversion menu - Improved financial entry menu - Remember x-value when switching to stack-mode - Hide Options menu after selecting option Version 0.700 - Option added to work with hours:minutes:seconds (or degrees:minutes:seconds) - Changed initial precision to 16 to prevent rounding errors - Prevent display of e+0 and e-0 in scientific notation Version 0.603 - link to homepage in footer added - script for google analytics added Version 0.60 - Integration of stack-calculator and rpn-calculator - Improvement of data entry for financial calculations Version 0.50 - Major revision of layout to make user interface more simple - History sheet skipped in favor of calculated formulas + lastanswers memory - Formula of executed calculation in every stack memory - Lastanswer memory increased to 30 places - Improved user interface for financial calculations - Only one memory block (30 places) - Covariance and correlation functions skipped Version 0.44 - Last Answers as default memory - Option added to paste clipboard content in x-register - Corrected rounding in memories and history sheet - Entry of negative exponent in scientific notation with minus-key - Added thousands separator as option under [o] notation Version 0.43 - Activated Backspace key - Added some physical constants Version 0.42 - Option added to open calculator in separate window (press [b]) - Annuity calculations not always correct if historic information was used Version 0.40 - Financial calculations more logical and user friendly (submenus for CAGR, Annuity and Cashflow calculations) - Extra Memory-block with Last Answers (press [z] twice) - Scroll direction of History-box corrected - Some minor bugs<br> Version 0.30 - First release as Chrome extension