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Numerical accuracy and form of results in editorial computing
All calculations in editorial computing are performed - whenever
possible - in double precision, i.e. within an accuracy of 15-16
significant digits. By default, the results are displayed with
13-14 significant digits. The `accuracy' parameter in SURVO.APU
has no influence in editorial computing.

However, an ACCURACY specification controls the display accuracy.
ACCURACY=<4,5,...,or 16> gives # of significant digits in results
of editorial computing. Another form is
ACCURACY=-n where n is 1,2,3,... gives the # of decimals.
Examples:
................................................................................
ACCURACY=7  A=0.12345678901234567
A=0.1234568
................................................................................
ACCURACY=-2 A=12345.6789   B=-12
A.=12345.68      B.=-12.00

When extremely small or large values of results in editorial computing
are needed in accurate form, a ' (single quotation mark) in the
control column on those lines of values implies the results to be
displayed in exponential form (1.123456789012345e+123).

In versions 1.24+ it is possible to make calculations in multiple
precision up to about a million digits. See MULTIPLE?

  A = More information on arithmetics