1/e: First Edition
10B12B: 10-Bits/12-Bits
10B2: 10Base2
10BT: 10BaseT
10FSL: 10.0 File System Layout
10X: 10-Speed
12X: 12-Speed
16CIF: 16 times CIF
1MM: 1 Meg Modem
1MMS: 1 Meg Modem Service

1NF: First Normal Form
1X: Single-Speed
2 Dr: 2 Draht
2/e: Second Edition
2B1Q: Two Binary One Quaternary
2D: 2-Dimensional
2Dr: 2 Draht

2NF: Second Normal Form
2PC: Two-Phase Commit
2WTI: 2-Wire Trunk Interface
2X: Double Speed
3/e: Third Edition
3ACC: 3A Central Control
3D: 3-Dimensional
3D: Three Dimensional
3D-TV: Three-Dimensional Television
3DA: 3-Dimensional Architecture
3DA: Three Dimensional Architecture
3DANN: Three Dimensional Artificial Neural Network
3DES: Triple Data Encryption Standard
3DES: Triple DES
3DMF: Three Dimensional Metafile Format
3DOF: Three Degrees of Freedom
3DR: 3DRender
3G: Third Generation

3GL: Third Generation Language
3GPP: Third-Generation Partnership Project

3NF: Third Normal Form
3P: Three Pole
3PC: Third Party Connect