ance metrics of the O-RAN sys- items, such as L1/L2 algorithmic performance as well as user performance in terms such as latency, throughput, and capacity. Chapter 10, Interoperability and Test, establishes standards software techniques for inte- gration and test before covering 3GPP/O-RAN specific system integration and test aspects. Chapter 11, Differentiation by Use Case, shows a few "off the normal" O-RAN use-cases/ implementations to give the reader insight into what kinds of products can be established with an O-RAN systems architecture. These systems are discussed as practical implementa- tions that showcase O-RAN strengths of ecosystem-based development and software centricity. Acronyms Third-Generation Partnership Project 5G Core 5G QoS Identifier Alliance for Connected Industries and Automation Access Control Lists Adjacent Channel Leakage Ratio Adjacent Channel Power Ratio Advanced Driver-Assistance Systems Analog to Digital Converter Automatic Gain Control Acknowledged Mode Access and Mobility Management Function Analog Pre Distortion Application Programming Interface Allocation and Retention Priority Average Revenue Per Unit Automatic Repeat Request Application Specific Integrated Circuit Abstract Syntax Notation 1 Asynchronous Transfer Mode Additive White Gaussian Noise Antenna Container Broadcast Control Channel Broadcast Channel Best Effort Bit Error Rate Broadband Fixed Wireless Access Block Error Rate Binary Phase-Shift Keying Buffer Descriptor Best Effort Base Station Bandwidth Partitioning Code Block Common Control Channel Crest Factor Crest Factor Reduction C-ITS Cooperative Intelligent Transport Systems Command Line Interface Cooperative Multipoint Commercial Off-The-Shelf Control Plane Certified Professional Installer xviii Acronyms Central Processing Unit Common Public Radio Interface Cyclic Redundancy Check Cell Site Router Central Unit Device to Device Digital to Analog Converter Distributed Antenna System Decibel Dual Connectivity Dedicated Control Channel Downlink Control Information D