These are a series of sector groupings defined by the Association of British Insurers for all UK life company funds that it covers to ensure that all funds are grouped with similar funds for comparison purposes.
Found on http://www.encyclo.co.uk/local/20174
Application Binary Interface, the interface of passed structures between the user processes (and libraries) and the kernel. For compatibility, it is important that these remain as static as possible (i.e. making sure that variables and structure members have the same bytesize as before, and in the same ordering). Occasionally breakage is necessary,... Found on https://www.encyclo.co.uk/local/22606