| 4G | – | Fourth Generation |
| ADSL | – | Asymmetric Digital Subscriber Line |
| ASPI | – | All Share Price Index |
| API | – | Application Programming Interface |
| BPM | – | Business Process Management |
| BPO | – | Business Process Outsourcing |
| BPR | – | Business Process Re-engineering |
| BSS | – | Billing Support System |
| CDMA | – | Code Division Multiple Access |
| CEA | – | Communications Enabled Applications |
| CLI | – | Caller Line Identification |
| CRM | – | Customer Relationship Management |
| DC HSPA+ | – | Dual-Carrier High Speed Packet Access |
| DEL | – | Direct Exchange Line |
| E1 | – | E – Carrier System Level 1 |
| EBITDA | – | Earnings Before Interest, Taxes, Depreciation and Amortisation |
| EFTNS | – | External Fixed Telecommunications Network Services |
| EPF | – | Employees’ Provident Fund |
| ERP | – | Enterprise Resource Planning |
| ETA | – | Electronic Travel Authorisation |
| ETF | – | Employees’ Trust Fund |
| FCR | – | Fault Clearance Rate |
| FTTB | – | Fibre-To-The-Building/Business |
| FTTC | – | Fibre-To-The-Curb |
| FTTH | – | Fibre-To-The-Home |
| FTTN | – | Fibre-To-The-Node |
| Gbps | – | Gigabits per second |
| GDP | – | Gross Domestic Product |
| GITR | – | Global Information Technology Report |
| GPS | – | Global Positioning System |
| GRI | – | Global Reporting Initiative |
| GSR | – | Global Symposium for Regulators |
| GTH | – | Global Telecommunications Holdings |
| HDTV | – | High Definition Television |
| HSPA | – | High Speed Packet Access |
| ICT | – | Information and Communication Technologies |
| ICTA | – | Information and Communication Technology Agency of Sri Lanka |
| IDD | – | International Direct Dialling |
| IFRS | – | International Financial Reporting Standards |
| IGW | – | International Gateway |
| IMS | – | IP Multimedia Subsystem |
| INED | – | Independent Non-Executive Director |
| IoT | – | Internet of Things |
| IP | – | Internet Protocol |
| IP-VPN | – | Internet Protocol Virtual Private Network |
| IPTV | – | Internet Protocol Television |
| ISP | – | Internet Service Provider |
| ITU | – | International Telecommunication Union |
| KPO | – | Knowledge Process Outsourcing |
| KPI | – | Key Performance Indicator |
| LEARN | – | Lanka Education and Research Network |
| LED | – | Light Emitting Diode |
| LGN | – | Lanka Government Network |
| LTE | – | Long-Term Evolution |
| Mbps | – | Megabits per second |
| MEF | – | Metro Ethernet Forum |
| MEN | – | Metro Ethernet Network |
| MIMO | – | Multiple-Input and Multiple-Output |
| MPEG | – | Moving Picture Experts Group |
| MPLS | – | Multiprotocol Label Switching |
| MSAN | – | Multi-Service Access Nodes |
| NBN | – | National Backbone Network |
| NED | – | Non-Executive Director |
| NFC | – | Near Field Communication |
| NGN | – | Next Generation Network |
| NOC | – | Network Operating Centre |
| NRI | – | Network Readiness Index |
| OSS | – | Operational Support System |
| OTT | – | Over the Top |
| PEO TV | – | Personalised Entertainment Option Television |
| PoP | – | Point of Presence |
| PSTN | – | Public Switched Telephone Network |
| PTC | – | Pacific Telecommunications Council |
| RAS | – | Revenue Assurance System |
| SAFA | – | South Asian Federation of Accountants |
| SBN | – | SLT Backbone Network |
| SDH | – | Synchronous Digital Hierarchy |
| SDM | – | Space Division Multiplex |
| SEA ME WE | – | South East Asia-Middle East-West Europe |
| SLBN | – | Sri Lanka Telecom Broadband Network |
| SLFRS | – | Sri Lanka Accounting Standards |
| SLIM | – | Sri Lanka Institute of Marketing |
| SME | – | Small and Medium Enterprise |
| SMS | – | Short Message Service |
| SOA | – | Service Oriented Architecture |
| STM-1 | – | Synchronous Transport Module Level-1 |
| SVOD | – | Subscription Video on Demand |
| TRCSL | – | Telecommunication Regulatory Commission of Sri Lanka |
| UMTS | – | Universal Mobile Telecommunications System |
| VDSL | – | Very High Bit Rate Digital Subscriber Line |
| VoD | – | Video on Demand |
| VoIP | – | Voice over Internet Protocol |
| VPN | – | Virtual Private Network |
| WAP | – | Wireless Access Protocol |
| WiMAX | – | Worldwide Interoperability for Microwave Access |
