| Acronym | Full Term | Usage |
| ADD-Lite | Asset Data Dictionary Lite | Terminology used for Assets in the engineering side of the business |
| AKBS | | Asset Knowledge Business Support |
| AMT-Sybex | | Original contractor and UK supplier of Ellipse. |
| APEX | Oracle Application Express | Formerly Oracle HTML DB. This is a lightweight web application tool which requires no software installation on the client |
| ARCSYS? | | System for geographical locationb matching on NR track network. Should be central point for all geo-spatial lookups |
| CAI | Corporate Asset Inventory | Cross matching of assets in the different systems |
| CICS | Customer Information Control System | CICS is a transaction processing system designed for both online and batch activity. <html><br></html>A transaction is basically a set of operations performing a task |
| CNM | Corporate Network Model | Manages all network related data such as track data, ballast and posessions. Now part of the GI Portal |
| EC | Equipment Class | Term used to denote a class of assets for Ellipse |
| ERP | Enterprise Resource Planning | A tool used for planning consumption, generation and maintenance of a company's resources |
| FMS | Fault Management System | |
| GeoGis | | Geographical system with node locations for track layout etc. |
| GZAM | Green Zone Access Management | Used to allocate & co-ordinate green zones (i.e. safe working areas) when performing maintenance |
| IM | Infrastructure Management | The actual maintenance arm of Network Rail |
| IM | Information Management | The IT arm of of Network Rail |
| IWOC | | Work Order Closure |
| MDM | | |
| MIMS | | |
| NESA | North East Section Appendix | The North East specific section of the Sectional Appendix |
| NST | | |
| RDMS | Rail Defect Management System | System used to log defects found by engineers. Generates WAFS |
| ROT | Right On Track | A small access system used in Scotland for Access Point management |
| SA | Sectional Appendix | |
| TASR | Track Asset System Replacement | Name for the programme to rationalise and consolidate multiple track asset systems. Will eventually replace GeoGis |
| TRUST | Performance Monitoring | A mainframe system that reports cross-rail delays and performance. Not NR |