Sort of the list according to one specific parameter.

The command ocl and a syntax like:

ocl -s parameter

is used to obtain a list of all clusters ordered by increasing value of one of the following parameters:

m-M    distance modulus         alf    right ascension
d      distance in pc           dec    declination
e      reddening                l      galactic longitude 
t      age                      b      galactic latitude 
nom    anon cluster names       z      distance to the galactic plane 
D      diameter

Example:

ocl -s d makes a list ordered by increasing distance