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The program Ortocartan for algebraic calculations in relativity has just beenimplemented in the Codemist Standard Lisp and can now be used under the Windows98 and Linux operating systems. The paper describes the new facilities andsubprograms that have been implemented since the previous release in 1992.These are: the possibility to write the output as Latex input code and asOrtocartan's input code, the calculation of the Ellis evolution equations forthe kinematic tensors of flow, the calculation of the curvature tensors fromgiven (torsion-free) connection coefficients in a manifold of arbitrarydimension, the calculation of the lagrangian from a given metric by theLandau-Lifshitz method, the calculation of the Euler-Lagrange equations from agiven lagrangian (only for sets of ordinary differential equations) and thecalculation of first integrals of sets of ordinary differential equations ofsecond order (the first integrals are assumed to be polynomials of seconddegree in the first derivatives of the functions).Comment: 16 pages, LaTeX, no figures, accepted for publication in GRG. In the  earlier version, equivalent formulae quoted from different computer printouts  were differently ordered. Now all orderings are the same, and a few typos  have been corrected. Subjects: Algebraic computing, general relativit

The Newest Release of the Ortocartan Set of Programs for Algebraic Calculations in Relativity