  Nowadays the Science progress depends on the numerical calculus, due to the
possibility of obtention of solutions using simulations which would be
impracticable, or even impossible, to be analitically obtained. In this aspect,
it becomes important to dominate the fundamental tools of numerical calculus
applied to some programming language, Fortran for example. In this work we
presented few basic concepts of the Fortran 77. We show how this concepts can
be applied in the simulation and analysis of physical systems, trying to offer
a first contact, a guide, with this programming language. We presented the
construction of routines that model the behavior of spring-mass system,
trigonometric functions and a more complex system, the standart map. We
presented a discussion about meaningful learning involving physical concepts
and programming in Fortran.
