| Subject | English | Danish |
| commun. | Internet packet exchange/sequenced packet exchange | IPX/SPX-protokol |
| comp., MS | Internetwork Packet Exchange/Sequenced Packet Exchange Transport protocols used in Novell NetWare networks, which together correspond to the combination of TCP and IP in the TCP/IP protocol suite. Windows implements IPX through NWLink | IPX/SPX (Internetwork Packet Exchange/Sequenced Packet Exchange) |
| el. | packet receive sequence number P R field | felt med pakkemodtagelsesnummer |
| el. | packet send sequence number P S field | felt med pakkeafsendelsesnummer |