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HISTORY.rst

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TEMPO was originally written in the 1980s, aiming for microsecond-level accuracy. TEMPO2 was written more recently, with an attention to nanosecond-level effects. Both are still in current use. But TEMPO is in FORTRAN, TEMPO2 is in C++, and neither is easy to extend for use in tasks different from plain pulsar timing. Most of TEMPO2 is also a direct conversion of TEMPO, so many bugs from TEMPO were carried over to TEMPO2. PINT was created to be, as far as possible, an independent re-implementation based on existing libraries - notably astropy - and to be a flexible toolkit for working with pulsar timing models and data.