Software package for numerical calculus, statistics, graphs and mathematical simulations Simfit Software package for numerical calculus, statistics, graphs and mathematical simulations PHYSICAL SCIENCE & MATHEMATICS Astrologers Astronomers Astrophysicists Opticals Statesmen Mathematicians Physicists NATURAL SCIENCES Bacteriologists Biologists Biochemicals Climatologists Environmental technicians Meteorologists Micrologist HEALTH & MEDICAL SCIENCES Epidemiologists Pharmacists Neurologists ENGINEERING & ARCHITECTURE Industrial designers Materials engineers Energy engineers Hydraulic engineers Chemical engineers