XCF | eXperimental Computing Facility |
XD | without Dividend |
XDR | eXternal Data Representation |
XFER | Transfer |
XINU | XINU Is Not UNIX |
XL | eXtra Large |
XMM | X-ray Multi Mirror (Espacial) |
XMTR | transMiTteR (o X é para trens) |
XNS | Xerox Network Services |
XO | eXecutive Officer |
XOR | eXclusive OR (função lógica) |
XPORT | Transport |
XSECT | cross SECTion |
XTAL | crysTAL (veja também XMTR) |
XUI | X-windows User Interface |
XUV | eXtreme UltraViolet (Espacial) |