[size=100]a software for "mathematics". It contains various systems.[br][br]CAS, Computer Algebra System is one of them.[br]For example, we calculate quotient numbers with CAS.[br][br][math]\frac{1}{2}+\frac{1}{3}=\frac{5}{6}[/math][br] [br]CAS is supporting polynomials, factorization, derivatives, integrals, group and algebra, etc.[br][br]General purpose sytems:[br][list][*][color=#ff0000]Mathematica, Maple[/color], [color=#0000ff]Maxima, Reduce, Sage, Giac/XCAS[/color], ...[/*][/list]CAS for research:[br][list][*][color=#0000ff]GAP, PARI/GP, [/color][/*][*][color=#0000ff]CoCoA, JAS, Macaulay2, Risa/Asir, Singular, ...[/color][/*][*][color=#0000ff]Cadabra, Polymake, Regina, Snappy, Surf families, ...[/color][/*][/list]Numerical systems:[br][list][*][color=#ff0000]Matlab[/color], [color=#0000ff]Octave, Scilab, BLAS, Julia[/color], ...[/*][/list]Publishing systems is a mathematical software:[br][list][*][color=#0000ff]TeX, LaTeX, (Beamer, a0poster, TikZ)[/color][br][/*][/list]Statistical software:[br][list][*][color=#0000ff]R[/color], Fathom, ...[br][/*][/list]Dynamic geometry software:[br][list][*][color=#ff0000]Cabri, Geometer's Sketchpad[/color], Cinderella, [color=#0000ff]GeoGebra[/color], ...[br][/*][/list][br]Developing mathematical software is a research area for mathematics.[br][list][*][url=http://www.swmath.org/]http://www.swmath.org/[/url][/*][/list][br][/size]