عمران سیاوش

I wrote my first calculator application (see right) on Windows 3.1 in 1996. It lacked a proper calculation stack, so there was no order of precedence (keying in "5 + 3 × 2 =" would give 16, rather than 11). However, it was only intended to be an exercise in Windows programming.

It was fun and sowed the seeds of what would later become DreamCalc, when a few years later, I lost the trusty scientific calculator I'd had since school. When I bought a new one, I found that I simply could not get used to its input style. I had grown up with postfix algebraic calculators, but the new fashion was for prefix input.

I despaired for a while and even resorted to using the standard Windows calculator. I soon struck upon the crazy idea that I would write my own calculator application and, after a period of my life characterized by blood, sweat and tears, DreamCalc was born...

Andy Thomas
DreamCalc Author

DreamCalc Primeval on Window 3.1

DreamCalc 1

DreamCalc first appeared in early 2003, and could accept input in both the postfix and prefix algebraic styles. DC1 also had a "Paper Roll Window" and a limited number of unit conversions and constants.

DreamCalc 1

DreamCalc Pro 2

DreamCalc 2 (known as DreamCalc Pro) appeared late 2003. It boasted a new set of statistical keys and an optional range of financial functions. There was also a new list window so that statistical data could be entered easily, but no graphing as yet.

DreamCalc Pro 2

DreamCalc 3

DreamCalc 3 was released in March 2005 and represented a giant leap forward in terms of usuability and features. The interface was substantially improved and DreamCalc now sported RPN input, complex numbers, and a polynomial solver.

Signicantly, however, DC3 saw the introduction of graphing support and it was the first version to be available as multiple editions.

DreamCalc 3 (Professional Edition)

DreamCalc 4

DreamCalc 4 was released with the arrival of Windows Vista. It has a new rugged look and the main window can be "drag-resized". Graphing has also been substantially improved since DC3.

Other new features include an optional row of base-N keys, access to the full range math functions in base-N mode, and the ability to annotate the Paper Roll.

DreamCalc 4 (Professional Edition)