1. 
   SWI
   SoftWare Interrupt - a name given to a routine in RISC OS - it can be one provided by the operating system itself or one which an application creates - it is then available to be used by other applications and so is, effectively, an extension to the operating system
   Found op http://www.archivemag.co.uk/
   
   
2. 
   swi
   1) Lucerne's land, in nato shorthand
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/swi/1
   
   

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