“…ICT was used in planning various aspects of Hajj and Umrah as well. For instance, Deep Learning (DL) was used to estimate the number of pilgrims visiting the holy sites in Technology References Ad-Hoc Networks [80], [112] Adrouino Microcontroller [70], [190], [287] Augmented Reality (AR)-Virtual Reality (VR)-Mixed Reality (MR) [93], [133]- [138], [140], [144], [146], [207], [211] Business Intelligence (BI) [42], [183] Big Data Analytics [50], [169] Bluetooth Low Energy (BLE) [68], [115], [191], [238]- [241], [288] Blockchain [154], [155], [162], [289]-[291] Closed-Circuit TeleVision (CCTV) [248], [292] Cellular Networks [70], [71], [81], [107], [115], [187], [189], [191], [196] Cloud Computing [75], [220], [229], [267], [293], [294] Cryptography…”