It incorporates the extension defined by the Technical Report:
whose final draft is visible as N1602. This was written as a Technical Report because the feature was deemed too important to wait for the next revision of the Standard.
It also incorporates all the corrections in the corrigenda to Fortran 2003, which are detailed in N1823.
The most important new features is:
In addition, there are a considerable number of minor technical enhancements.
An unofficial summary of these enhancements is available as
Two extensions of Fortran 2008 are defined by the Technical Specifications:
whose final draft is visible as N1942 and
whose final draft is visible as N2074. These were written as Technical Reports because the features were deemed too important to wait for the next revision of the Standard.