TARDIS console rooms, in any of the known configurations, is the TARDIS console that holds the instruments that control the ship's functions. The appearance of the primary TARDIS consoles has varied widely but shares common details: hexagonal pedestals with controls around the periphery, and a moveable column (or time rotor as it has been called in the original series and the 2011 episode "The Doctor's Wife") in the centre that bobs rhythmically up and down when the TARDIS is in flight, like a pump or a piston. The secondary console was first seen in season 14 (1976–77) of the original series.
Circular letter of credit Circular letter of credit A circular letter of credit was a letter of credit issued by a bank or related financial institution to a private person, usually an individual of means, which enabled that person to draw funds from correspondent banks while traveling. This was considered safer than carrying large sums of cash. Such letters were often issued on special paper with formal lettering and designs to discourage counterfeiting. The circular letter of credit generally consisted of two or three separate items. The first being the actual letter addressed to correspondent banks stating the amount of funds that can be