↑ Generally, TARDIS (Time and Relative Dimensions in Space) is written in all upper case letters—this convention was popularised by the Targetnovelisations of the 1970s. However, the use of Tardis is equally correct and consistent with current British press style, in which acronyms which form a pronounceable word are spelled with only the first letter capitalised (for example, Bafta), while acronyms requiring each letter to be read out (also known as "initialisms") are capitalised in their entirety (for example, BBC). Many examples of the form Tardis are found in media and, occasionally, licensed publications (in the 2005 series episode "World War Three", the caller ID of the TARDIS is displayed on Rose Tyler's mobile phone as "Tardis calling"—this capitalisation of only the initial letter being the default setting for Nokia mobile phones). The OED has the word "Tardis" capitalised as such with a first appearance from the Times in 1969. (“Tardis, n.”. Oxford English Dictionary. tháng 6 năm 2002. His best poems are like Doctor Who's Tardis, the solid streetcorner policebox, which actually contains a sidereal spaceship.)
↑ There is some disagreement over whether the "D" in the name stands for "dimension" or "dimensions"; both have been used in various episodes. The very first story, An Unearthly Child (1963), used the singular "Dimension" and other episodes followed suit for the next couple of years. The 1964 novelisation Doctor Who in an Exciting Adventure with the Daleks used the plural "Dimensions" for the first time and the 1965 serial The Time Meddler (1965) introduced it to the television series. Since then both versions have been used on different occasions; for example, it is singular again when mentioned in Frontios (1984). In "Rose" (2005), the Doctor uses the singular form (although this was a decision of the actor Christopher Eccleston—the line was scripted in the plural). Likewise, the Tenth Doctor keeps the word firmly singular in "Smith and Jones" (2007). The plaque set on the TARDIS console in the current design also uses the singular form. The 2011 episode "The Doctor's Wife" further establishes the singular as definitive by having the TARDIS herself use "Dimension" when uttering the full meaning of the acronym.
↑ In the two 1960s Dalek films, the craft was referred to as Tardis, without the definite article.
