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INT 13h is shorthand for BIOS interrupt call 13 hex, the 20th interrupt vector in an x86-based (IBM PC-descended) computer system.The BIOS typically sets up a real mode interrupt handler at this vector that provides sector-based hard disk and floppy disk read and write services using cylinder-head-sector (CHS) addressing.
Nitrogen-13 is used in medical PET imaging in the form of 13 N-labelled ammonia. It can be produced with a medical cyclotron, using a target of pure water with a trace amount of ethanol.
The WIG20 is a capitalization-weighted stock market index of the twenty largest companies on the Warsaw Stock Exchange.WIG is an acronym for "Warszawski Indeks Giełdowy", which translates to Warsaw Stock Index in Polish.