Characteristics

4allCalc

• does not try to simulate a real calculator: For example, it does not have an "=" button. The notation of the formulas is like in a programming language. Nevertheless, there is a calculator-like mouse interface.
  
• is Shareware. Without a registration key, you will get sometimes an info screen at the beginning - there's no other limitation.
  
• is available for Windows and OS/2.
  
• recalculates the result after every keystroke. You have an entry field and a separate result field. If a formula is incomplete or erroneous, 4allCalc will display a detailed error message instead of the result. You can choose between different output formats.
  
• supports easy transfer of input and output through the clipboard.
  
• enables calculating with variables: X in the main entryfield will be replaced by the contents of the X entryfield.
  
• recalculates variables like X if the result is given (regression in one dimension)
  
• supports scientific functions (sine, logarithm...)
  
• offers programmers functionality: hexadecimal, octal, binary and Ascii input, overflow simulation of integer variables.
  
• remembers the last 20 inputs ("history list") and saves formulas permanently.
  
• supports context-sensitive hypertext online help.
  
• calculates with "long double" floating point values, so you have 19 correct digits.