I. Introductory Remarks

II. Ongoing Standardization Efforts and Open Source Contributions to the O-RAN Architecture

III. In-Depth Analysis of O-RAN Architecture with a Particular Emphasis on Network Slicing

IV. O-RAN NFs, Network Slicing, and SMO Deployment Options

V. Slicing the Underlying Infrastructure in O-RAN Architecture

VI. Exploring Use Cases Related to Network Slicing in O-RAN Architecture

VII. Concluding Remarks and Future Outlook