I. INTRODUCTION  
A. Application Domains and Challenges  
B. Existing Surveys and Tutorials on the Tactile Internet  
C. Paper’s Scope, Organization, and Reading Map  

II. RELATED AND ENABLING TECHNOLOGIES  
A. Related Technologies  
B. Enabling Technologies  
B. Illustrative Use Cases  
C. Tactile Internet Evaluation Criteria  

III. ARCHITECTURES, PROTOCOLS, AND INTELLIGENT PREDICTION FOR THE TACTILE INTERNET  
A. Application-agnostic Architectures  
B. Application-specific Architectures  
C. Protocols  
D. Intelligent Prediction Schemes  
E. Summary, Insights, and Lessons Learned  

IV. RADIO RESOURCE ALLOCATION ALGORITHMS FOR THE TACTILE INTERNET  
A. Uplink Transmission  
B. Downlink Transmission  
C. Joint Uplink and Downlink Transmission  
D. Network Slicing  
E. Summary, Insights, and Lessons Learned  

V. WLAN/WBAN AND PASSIVE OPTICAL NETWORKS  
A. WLAN and WBAN  
B. Passive Optical Network  
C. PHY Layer  
D. Summary Insights and Lessons Learned  

VI. NON-RADIO RESOURCE ALLOCATION ALGORITHMS BEYOND LOWER LAYERS FOR THE TACTILE INTERNET  
A. Edge Resource Allocation  
B. Co-design  
C. Routing  
D. Switching  
E. Summary Insights and Lessons Learned  

VII. RESEARCH DIRECTIONS  
A. Architectures  
B. Protocols  
C. Intelligent Prediction  
D. Algorithms  

VIII. CONCLUSIONS