Ministry of Defence Main Building (United Kingdom) each and cost £12,600. Similar figures representing "air" and "fire" were intended to be installed at the south end of the building, however these were never constructed. During the 1950s, building staff nicknamed the statues "Mr and Mrs Parkinson", after Cyril Northcote Parkinson, the Board of Trade civil servant who devised Parkinson's Law which states "work expands so as to fill the time available for its completion". More recently MOD staff refer to the statues as the "two fat ladies". The badge of the RAF is carved into stone columns either side of the southern entrance to the building, reflecting
Robustness principle Robustness principle In computing, the robustness principle is a design guideline for software: The principle is also known as Postel's law, after Jon Postel, who wrote in an early specification of TCP: In other words, programs that send messages to other machines (or to other programs on the same machine) should conform completely to the specifications, but programs that receive messages should accept non-conformant input as long as the meaning is clear. Among programmers, to produce compatible functions, the principle is popularized in the form be contravariant in the input type and covariant in the output type. RFC 1122 (1989)