Title	Key Challenges of Mobility Management and Handover Process In 5G HetNets
Author	Sultan Alotaibi
Citation	Vol. 22  No. 4  pp. 139-146
Keywords	Mobility management, handover, 5G, HetNets.

Title	Virtual Machine Placement Methods using Metaheuristic Algorithms in a Cloud Environment ? A Comprehensive Review
Author	Deafallah Alsadie
Citation	Vol. 22  No. 4  pp. 147-158
Keywords	Cloud computing, Virtualization, VM Placement, Metaheuristic Algorithms.

Title	On Interesting Correlation between Meteorological Parameters and COVID-19 Pandemic in Saudi Arabia
Author	Mohd Anul Haq, Ahsan Ahmed, Ahmed Ibrahim Shahin
Citation	Vol. 22  No. 4  pp. 159-168
Keywords	Covid-19; Temperature; Humidity; Dew point; Wind speed; Saudi Arabia

Title	Pre-service Special Education Teachers’ Knowledge and Perceptions of Using Computer Technology in Teaching from PST Perspectives
Author	Mohammed M. Alhwaiti
Citation	Vol. 22  No. 4  pp. 169-174
Keywords	pre-service special education teachers, computer technology, students with disabilities.