The table shown below is the representation of level 1 and Level 2 categories for Hardware, Software, Operating Systems, IoT and OT (Operational Technology)
| Category Type | Level 1 | Level 2 |
| Hardware | Call Management Systems or Accessories | Premise Branch Exchange (PBX) |
| Hardware | Call Management Systems or Accessories | Other |
| Hardware | Communication Devices | Pay Phone |
| Hardware | Communication Devices | Fixed Phone |
| Hardware | Communication Devices | Answering Machine |
| Hardware | Communication Devices | Special Purpose Telephones |
| Hardware | Communication Devices | Digital Telephones |
| Hardware | Communication Devices | Analog Telephone |
| Hardware | Communication Devices | Two Way Radios |
| Hardware | Communication Devices | IP Phones |
| Hardware | Communication Devices | Digital Enhanced Cordless Telecommunications (DECT) Cordless Phones |
| Hardware | Communication Devices | Video Phone |
| Hardware | Communication Devices | Satellite Phone |
| Hardware | Communication Devices | Speaker Phone |
| Hardware | Communication Devices | Keyphone System |
| Hardware | Communication Devices | Conferencing Equipment |
| Hardware | Communication Devices | Other |
| Hardware | Computer Accessories | Computer Switch Boxes |
| Hardware | Computer Accessories | Docking Stations |
| Hardware | Computer Accessories | Port Replicators |
| Hardware | Computer Accessories | Peripheral Switch Boxes |
| Hardware | Computer Accessories | Signal Processor Upgrades |
| Hardware | Computer Accessories | Multimedia Kits |
| Hardware | Computer Accessories | Encoder Decoder Equipment |
| Hardware | Computer Accessories | Universal Serial Bus Hubs or Connectors |
| Hardware | Computer Accessories | Computer Country or Localization Kits |
| Hardware | Computer Accessories | Handheld PDA Starter Kits |
| Hardware | Computer Accessories | Computer Accessory Kits |
| Hardware | Computer Accessories | Computer or Notebook Stands |
| Hardware | Computer Accessories | Bluetooth Universal Serial Bus (USB) Adapter |
| Hardware | Computer Accessories | Notebook Computer Expansion Dock |
| Hardware | Computer Accessories | Personal Digital Assistant (PDA) Holder |
| Hardware | Computer Accessories | Universal Serial Bus (USB) Extension Cable |
| Hardware | Computer Accessories | Universal Serial Bus General Packet Radio Service (USB GPRS) modem |
| Hardware | Computer Accessories | Notebook Computer Carrying Case |
| Hardware | Computer Accessories | Other |
| Hardware | Computers | Server |
| Hardware | Computers | Desktop |
| Hardware | Computers | Notebook |
| Hardware | Computers | Mainframe |
| Hardware | Computers | Point of Sale (POS) Terminal |
| Hardware | Computers | Other |
| Hardware | Computers | Computer Kiosk |
| Hardware | Computers | Assembled |
| Hardware | Computers | Single Board Computer |
| Hardware | Computers | Vehicle Mounted Computer |
| Hardware | Gaming Devices | |
| Hardware | Gaming Devices | AR/VR Headset |
| Hardware | Gaming Devices | Gaming Console |
| Hardware | Gaming Devices | Portable Gaming Console |
| Hardware | Gaming Devices | Gaming Console Accessories |
| Hardware | Gaming Devices | AR/VR Accessories |
| Hardware | Input Devices | RFID Device |
| Hardware | Input Devices | Other |
| Hardware | Input Devices | Disc Publisher |
| Hardware | Input Devices | Scanners |
| Hardware | Mobile | E-Reader |
| Hardware | Mobile | Stick PC |
| Hardware | Mobile | Smartphone |
| Hardware | Mobile | Tablet |
| Hardware | Mobile | Other |
| Hardware | Network Security Device | VPN Device |
| Hardware | Network Security Device | Firewall Device |
| Hardware | Network Security Device | Secure Application Gateway |
| Hardware | Network Security Device | Vulnerability Management |
| Hardware | Network Security Device | Other |
| Hardware | Network Security Device | Network Traffic Monitoring |
| Hardware | Networking Device | Bridges and Routers |
| Hardware | Networking Device | Concentrators, Hubs, and Multiplexers |
| Hardware | Networking Device | Switch |
| Hardware | Networking Device | Modem |
| Hardware | Networking Device | Print Server |
| Hardware | Networking Device | Terminal Server |
| Hardware | Networking Device | Wireless Fidelity Base Stations Wifi |
| Hardware | Networking Device | Server Load Balancer |
| Hardware | Networking Device | Access Servers |
| Hardware | Networking Device | Remote Management Adapters |
| Hardware | Networking Device | Network Management or Monitoring Device |
| Hardware | Networking Device | Wireless Access Point |
| Hardware | Networking Device | Other |
| Hardware | Power Conditioning Equipment | Power Distribution Unit (PDU) |
| Hardware | Power Conditioning Equipment | Uninterruptible Power Supply (UPS) |
| Hardware | Power Conditioning Equipment | Power Adapters or Inverters |
| Hardware | Power Conditioning Equipment | Other |
| Hardware | Printers | Multi-Function Printer (MFP) |
| Hardware | Printers | Laser |
| Hardware | Printers | Inkjet |
| Hardware | Printers | 3D Printers |
| Hardware | Printers | Line Matrix Printers |
| Hardware | Printers | Compact Disc (CD) or Labeling Printer |
| Hardware | Printers | Thermal Tape Printers |
| Hardware | Printers | Other |
| Hardware | Storage Devices | Network Attached Storage (NAS) Device |
| Hardware | Storage Devices | Hard Disk Arrays |
| Hardware | Storage Devices | Tape Drives |
| Hardware | Storage Devices | Other |
| Hardware | Storage Devices | Solid State Drive (SSD) |
| Hardware | System Boards Processors Interfaces or Modules | Motherboard |
| Hardware | System Boards Processors Interfaces or Modules | Transceivers and Media Converters |
| Hardware | System Boards Processors Interfaces or Modules | Other |
| Hardware | System Cards | Network Interface Card |
| Hardware | System Cards | Other |
| Hardware | Unidentified | |
| Hardware | Virtualized | Virtual Machine |
| Hardware | Virtualized | Container |
| Hardware | Virtualized | Cloud Instance |
| Hardware | Virtualized | |
| IoT Devices | Audio and Visual Devices | Audio Amplifier |
| IoT Devices | Audio and Visual Devices | Projector |
| IoT Devices | Audio and Visual Devices | Smart Speaker |
| IoT Devices | Audio and Visual Devices | Smart Earpiece |
| IoT Devices | Audio and Visual Devices | Smart TV |
| IoT Devices | Audio and Visual Devices | Portable Media Player |
| IoT Devices | Audio and Visual Devices | Media Streaming Device |
| IoT Devices | Audio and Visual Devices | Other |
| IoT Devices | Home or Building Automation Devices | Lighting control |
| IoT Devices | Home or Building Automation Devices | HVAC |
| IoT Devices | Home or Building Automation Devices | Safety, Security and Surveillance |
| IoT Devices | Home or Building Automation Devices | Smart Sensorse |
| IoT Devices | Home or Building Automation Devices | Smart Home Appliance |
| IoT Devices | Home or Building Automation Devices | Smart Energy Meters |
| IoT Devices | Home or Building Automation Devices | Other |
| IoT Devices | Wearable Devices | Health and Activity Monitor |
| IoT Devices | Wearable Devices | Smart Watch |
| IoT Devices | Wearable Devices | Smart Apparel |
| IoT Devices | Wearable Devices | Smart Cameras |
| IoT Devices | Wearable Devices | Smart Footwear |
| IoT Devices | Wearable Devices | Smart Glasses |
| IoT Devices | Wearable Devices | Other |
| Operating System | Embedded | |
| Operating System | Filesystem Software | |
| Operating System | Firmware | |
| Operating System | Linux | Client |
| Operating System | Linux | Server |
| Operating System | Linux | |
| Operating System | Mac | Client |
| Operating System | Mac | Server |
| Operating System | Mac | |
| Operating System | Mainframe | |
| Operating System | Mobile | |
| Operating System | Network Operating System | |
| Operating System | Other | |
| Operating System | Unidentified | |
| Operating System | Unix | Client |
| Operating System | Unix | Server |
| Operating System | Unix | |
| Operating System | Virtualization | Hypervisor Type-1 (Bare Metal) |
| Operating System | Windows | Client |
| Operating System | Windows | Server |
| Operating System | Windows | Embedded |
| Operating System | Windows | |
| OT | Building Automation Devices | BACnet Controller |
| OT | Building Automation Devices | BACnet Router |
| OT | Building Automation Devices | Lighting and Control |
| OT | Building Automation Devices | HVAC Control |
| OT | Building Automation Devices | Power and Energy Monitoring |
| OT | Building Automation Devices | Smart Appliance |
| OT | Building Automation Devices | Security Camera |
| OT | Building Automation Devices | Intrusion Detection and Access Control |
| OT | Building Automation Devices | Fire Safety |
| OT | Building Automation Devices | Leak Detection |
| OT | Building Automation Devices | Other |
| OT | Building Automation Devices | Building Automation Controller |
| OT | Building Automation Devices | Building Automation Router |
| OT | Data Acquisition, Test and Measurement System | Oscilloscope |
| OT | Data Acquisition, Test and Measurement System | Other |
| OT | Field Instruments | Measurement Systems |
| OT | Field Instruments | Motion Control |
| OT | Field Instruments | Robots |
| OT | Field Instruments | Sensor |
| OT | Field Instruments | Smart Meter |
| OT | Field Instruments | Other |
| OT | Field Instruments | Field Device Management |
| OT | Industrial Control System (ICS) | Distributed Control System (DCS) |
| OT | Industrial Control System (ICS) | Human Machine Interface (HMI) |
| OT | Industrial Control System (ICS) | I/O Module |
| OT | Industrial Control System (ICS) | Industrial PC |
| OT | Industrial Control System (ICS) | Intelligent Electronic Device (IED) |
| OT | Industrial Control System (ICS) | Programmable Logic Controller (PLC) |
| OT | Industrial Control System (ICS) | Remote Terminal Unit (RTU) |
| OT | Industrial Control System (ICS) | Safety Instrumented System (SIS) |
| OT | Industrial Control System (ICS) | SCADA |
| OT | Industrial Control System (ICS) | Other |
| OT | Industrial Networking | Industrial Network Security |
| OT | Industrial Networking | Industrial Ethernet Switch |
| OT | Industrial Networking | Industrial Media Converter |
| OT | Industrial Networking | Industrial Serial Device Server |
| OT | Industrial Networking | Industrial Wireless LAN |
| OT | Industrial Networking | IoT Gateway |
| OT | Industrial Networking | Other |
| OT | Industrial Networking | Communication Processor |
| OT | Process Analyzers | Gas Analyzer |
| OT | Process Analyzers | Liquid Analyzer |
| OT | Process Analyzers | Other |
| Software | Application Development | Programming Languages |
| Software | Application Development | Framework |
| Software | Application Development | Application Development Lifecycle Management (ADLM) |
| Software | Application Development | Testing |
| Software | Application Development | Runtime |
| Software | Application Development | Mobile App Development |
| Software | Application Development | Web Platform Development |
| Software | Application Development | Compiler and Decompiler |
| Software | Application Development | Application Programming Interface (API) |
| Software | Application Development | Development Tool |
| Software | Application Development | Other |
| Software | Auxiliary Software | Compression |
| Software | Auxiliary Software | Data Conversion |
| Software | Auxiliary Software | File Management |
| Software | Auxiliary Software | Desktop or Mobile Utility |
| Software | Auxiliary Software | Diagnostic and Optimization |
| Software | Auxiliary Software | Personal Finance |
| Software | Auxiliary Software | Other |
| Software | Business Intelligence and Analytics | Reporting |
| Software | Business Intelligence and Analytics | Corporate Performance Management (CPM) |
| Software | Business Intelligence and Analytics | BI Platforms |
| Software | Business Intelligence and Analytics | Portal Server Software |
| Software | Business Intelligence and Analytics | Other |
| Software | Collaboration | Web Conferencing |
| Software | Collaboration | Social Network and Instant Messaging |
| Software | Collaboration | Desktop Communications |
| Software | Collaboration | Team Collaboration |
| Software | Collaboration | Other |
| Software | Content Management | Enterprise Content Management (ECM) |
| Software | Content Management | Web Content Management (WCM) |
| Software | Content Management | Other |
| Software | Customer Relationship Management (CRM) | Customer Service and Support |
| Software | Customer Relationship Management (CRM) | Digital Commerce |
| Software | Customer Relationship Management (CRM) | Sales and Marketing Automation |
| Software | Customer Relationship Management (CRM) | Other |
| Software | Data Management and Quality | Data Quality |
| Software | Data Management and Quality | Data Integration |
| Software | Data Management and Quality | Master Data Management |
| Software | Data Management and Quality | Information Retrieval or Search |
| Software | Data Management and Quality | Clustering |
| Software | Data Management and Quality | Other |
| Software | Data Management and Quality | Data Collection |
| Software | Databases | NOSQL |
| Software | Databases | RDBMS |
| Software | Databases | Personal |
| Software | Databases | Client Tools |
| Software | Databases | Other |
| Software | Digital Content | Publishing |
| Software | Digital Content | Viewer |
| Software | Digital Content | Digital Video and Multimedia |
| Software | Digital Content | Music or Sound Editing |
| Software | Digital Content | Computer Game or Entertainment |
| Software | Digital Content | Graphic and Image |
| Software | Digital Content | Optical Character Reader or Scanning Software |
| Software | Digital Content | Other |
| Software | Digital Content | News and Magazine |
| Software | Digital Content | Weather |
| Software | Dynamic Port | Dynamic Port |
| Software | Educational or Reference | Multimedia Educational Software |
| Software | Educational or Reference | Route Navigation |
| Software | Educational or Reference | Other |
| Software | Enterprise Resource Planning (ERP) | Enterprise Asset Management (EAM) |
| Software | Enterprise Resource Planning (ERP) | Financial Management Systems (FMS) |
| Software | Enterprise Resource Planning (ERP) | Human Capital Management (HCM) |
| Software | Enterprise Resource Planning (ERP) | Manufacturing and Operations |
| Software | Enterprise Resource Planning (ERP) | Other |
| Software | Industrial Automation and Control | Design and Configuration |
| Software | Industrial Automation and Control | Manufacturing Operations Management |
| Software | Industry Specific Software | Analytical or Scientific |
| Software | Industry Specific Software | Engineering Design and Modelling |
| Software | Industry Specific Software | Financial Services |
| Software | Industry Specific Software | Other |
| Software | Industry Specific Software | Healthcare and Fitness |
| Software | Industry Specific Software | Job Search and Recruitment |
| Software | Industry Specific Software | Auto and Vehicle |
| Software | Industry Specific Software | Event Booking |
| Software | Industry Specific Software | Real Estate and Home Improvement |
| Software | Industry Specific Software | Lifestyle and Recreation |
| Software | Industry Specific Software | Food and Drink |
| Software | Industry Specific Software | Travel and Transport |
| Software | IT Operations | Application Performance Monitoring (APM) |
| Software | IT Operations | Process Automation |
| Software | IT Operations | IT Service Management (ITSM) |
| Software | IT Operations | IT Operation Management (ITOM) |
| Software | IT Operations | Enterprise Mobility Management (EMM) |
| Software | IT Operations | IT Asset and Inventory Management (ITAM) |
| Software | IT Operations | Agent |
| Software | IT Operations | Other |
| Software | Malware | Trojan |
| Software | Malware | Adware |
| Software | Malware | Bot |
| Software | Malware | Bug |
| Software | Malware | Ransomware |
| Software | Malware | Rootkit |
| Software | Malware | Spyware |
| Software | Malware | Virus |
| Software | Malware | Worm |
| Software | Malware | Other |
| Software | MiddleWare | Application Integration |
| Software | MiddleWare | Business Process Management |
| Software | MiddleWare | Portal and Digital Engagement Technologies |
| Software | MiddleWare | Other |
| Software | Network Application | Web Servers |
| Software | Network Application | Application Servers |
| Software | Network Application | Internet Browser |
| Software | Network Application | Internet Directory Services |
| Software | Network Application | File Transfer and Sharing |
| Software | Network Application | Other |
| Software | Networking | Terminal Emulation |
| Software | Networking | Access Software |
| Software | Networking | Platform Interconnectivity |
| Software | Networking | Network Performance Monitoring and Diagnostics (NPMD) |
| Software | Networking | Other |
| Software | Productivity | Word Processor |
| Software | Productivity | Spreadsheet |
| Software | Productivity | Presentation |
| Software | Productivity | Email and Calendar |
| Software | Productivity | Note Taking |
| Software | Productivity | Office Suite |
| Software | Productivity | Other |
| Software | Project and Portfolio Management (PPM) | Project and Portfolio Management (PPM) |
| Software | Project and Portfolio Management (PPM) | Other |
| Software | Protocol | File Transfer and Sharing |
| Software | Protocol | Terminal Emulation |
| Software | Protocol | Electronic Mail |
| Software | Protocol | Network Management |
| Software | Protocol | Bluetooth |
| Software | Protocol | Automation |
| Software | Protocol | Web Services |
| Software | Protocol | Messaging |
| Software | Protocol | Network Security |
| Software | Protocol | VoIP (voice over IP) |
| Software | Protocol | Wide Area Network |
| Software | Protocol | Local Area Network (LAN) |
| Software | Protocol | Metropolitan Area Network (MAN) |
| Software | Protocol | Storage Area Network (SAN) |
| Software | Protocol | ISO |
| Software | Protocol | Cisco |
| Software | Protocol | Novell NetWare and Protocols |
| Software | Protocol | IBM Systems Network Architecture (SNA) and Protocols |
| Software | Protocol | AppleTalk |
| Software | Protocol | DECnet |
| Software | Protocol | SSC/C7 |
| Software | Protocol | Others |
| Software | Reserved | Reserved |
| Software | Security | Endpoint Management and Security |
| Software | Security | Data Loss Prevention |
| Software | Security | Endpoint Protection |
| Software | Security | Identity Governance and Administration |
| Software | Security | Secure E-mail Gateway |
| Software | Security | Secure Web Gateway |
| Software | Security | Security Information and Event Management (SIEM) |
| Software | Security | Security Testing |
| Software | Security | Vulnerability and Security Configuration Assessment |
| Software | Security | Web Access Management (WAM) |
| Software | Security | Agent |
| Software | Security | Authentication |
| Software | Security | Other |
| Software | Storage | Backup and Recovery |
| Software | Storage | Integrated Systems |
| Software | Storage | Storage Network |
| Software | Storage | Other |
| Software | Supply Chain Management (SCM) | Procurement |
| Software | Supply Chain Management (SCM) | Supply Chain Execution and Planning |
| Software | Supply Chain Management (SCM) | Other |
| Software | Unassigned | Unassigned |
| Software | Unknown | Unknown |
| Software | Virtualization | Desktop Virtualization |
| Software | Virtualization | Containerization |
| Software | Virtualization | Hypervisor Type-2 (Hosted) |
| Software | Virtualization | Network Virtualization |
| Software | Virtualization | Storage Virtualization |
| Software | Virtualization | Administration |
| Software | Virtualization | Other |