[fitsbits] Abuse of EXTEND keyword

[Maren Purves]

Tim Pearson wrote:

> My guess (it's a long time ago) is that there were FITS files out  
> there that had special records that did not conform to the rules for  
> standard extensions, so the EXTEND keyword was needed. Or perhaps  
> Grosbøl et al wanted to leave open the possibility of other uses for  
> the special records, which would be indicated by different header  
> keywords.

binary tables?
(I remember converting JCMT data to NRAO style binary tables FITS
some time around 1990)

Aloha,
Maren