I. Introduction
II. Coexistence of NOMA and Sub-6 GHz Massive MIMO
III. Coexistence of NOMA and mmWave Massive MIMO
IV. Coexistence of NOMA and Cooperative Communications
V. Interplay Between NOMA and Cognitive Radio Networks
VI. NOMA and Physical Layer Security
VII. NOMA with Energy Harvesting
VIII. NOMA with Visible Light Communications
IX. NOMA with Mobile Edge Computing
X. NOMA with Other Technologies and Tools
XI. Conclusion