For a closer look at coordinate conversions, see the blog post that has been posted here.

crsdata: provides meta data about an individual CRS

transformdata: provides meta data about an individual transform

transform: provides a transformed list of points between two different CRS

findbesttransform: provides the best transform for a given CRS

findcrs: provides one or more CRS which match a keyword and display mode

findtransform: provides one or more transformations for a given CRS