Abscissa is a scientific 2D plot and fit program.
It offers:

  - ASCII import and export 
  - EPS export
  - fast reading and plotting
  - plotting in many styles
  - linear and logarithmic axes
  - text and graphic
  - x,y error bars
  - color support
  - 4 interpolation methods
  - user entered functions f(x)
  - flexible functions (parameters, user data, ...)
  - numerical derivation, integration
  - data manipulation with functions
  - parameter fitting with a Least Square Method
  - fit of function with several independent coordinates (Rn->R)
  - API: an interface to control Abscissa by external programs
  
  New in Version 2.0
   - a new formula interpreter
   - API: an interface to control Abscissa by external programs
   
IMPORTANT: Users who use formulas of version 1.x should read the help
section "New Formula Syntax" because of some incompatible syntax changes. 

  New in Version 1.9
   - tool box for mouse modes
   - arrow at end of axis

  New in Version 1.8
  - symbol size defineable by data column 
  - sorting data 
  - drag & drop of files
  - NextStep Help System

  New in Version 1.7
  - a data view window
  - a startup layout file
  - panel positions saved in layout files
  
  New in Version 1.6
  - new curve panel for better handling of many curves
  - moveable x and y axis
  
  New in Version 1.5
  - a second x- and y-axis with independent range is available.
  - run on MC680xx and Intel
  
  new in 1.4 compared to 1.1 :
  - layout-files to save most attributes of a plot
  - unlimited number of curves
  - unlimited numbers of windows
  - modify x-values of curves
  - simultaneous change of attributes of many curve
  - parameters can be fixed for fitting
  - Markers to recall parameters (designed for spectroscopy)
  - search all local maxima/minima of a curve
  
  Author: 
	Rödiger Bröhl
	TU-Berlin
	Institut för Strahlungs und Kernphysik
	Hardenbergstr. 36
	10623 Berlin
	Germany

e-mail:  bruehl@kalium.physik.tu-berlin.de 

Abscissa is Shareware.
If you use Abscissa regularly please remit DM 50 or $ 35. Commercial distribution is forbidden. There is no warranty for Abscissa.