different between dword vs oword

English

From double word.

dword (plural dwords)

(computing) A numerical value of twice the magnitude of a word, thus typically 32 bits.
- 1999, Don Anderson, Tom Shanley, PCI system architecture
  A bridge may combine posted memory writes to successive dwords into a single burst memory write transaction using linear addressing.

Shortening.

oword (plural owords)

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