The publishing and editorial teams would like to thank the following, for their invaluable service as 2021 reviewers for this journal. We are very grateful for the contributions made. With their help, the journal has been able to publish such high-quality articles:

• A, Anandaraj
• A, Dinesh
• A, Ganesh
• A, Vivekanandam
• Abidi, Mustufa Haider 
• Agarwal, Ambika 
• Ahmad, Rami
• Al Siyabi, Nasar
• Aljuneidi, Wassim
• Alqarni, Khalid
• Alsulami, Majid
• Ananthi J, Vijitha
• Anil Kumar, Budati
• Anitha, Thangavelu
• Anne W, Regis 
• Arora, Kiran
• Arumugam, Sundaram
• Arvind, K.S
• Ashraf, Shahzad 
• Asri, Hiba
• Assres, Gebremariam
• Ay, Dr.Prasad
• B, Prabhadevi
• B, Swapna
• Babu Katta, Rajesh
• Babu, D. Kishore 
• Babu, Praveenkumar
• Baghla, Silki 
• Balachander, K
• Bandecchi, Susan
• Bansal, Savina
• Barthwal, Ayushi
• Bashar, Abul
• Berahmand, Kamal
• Bhaskaruni, Praveena
• Bhati, Nitesh
• Bhatt, Ashutosh 
• Bhatt, Kedar
• Boeres, Cristina
• Bonafini, Stefano
• Borkar, Gautam
• C, Govindasamy 
• Çelik, Emre
• Cengiz, Korhan
• Ch ., Ram Mohan
• Chalasani, Suneetha
• Chametzky, Barry 
• Chander, Satish 
• Chandra, Bhanu
• Chen, Joy
• Chenna, Chenna Praveen
• Cherappa, Venkatesan
• Comsa, Ioan-Sorin
• Covaci, Alexandra
• D , Madhu Babu
• D, Ambika
• D, Bhavana
• D, James
• Dahiya, Pankaj
• Dalal, Renu
• Dalal, Sahil 
• Datta, Debabrata
• E, Ramanujam
• Farhood, Raad
• Farid, Farnaz
• G, Narendrababu Reddy
• G, Tony Santhosh
• Gajula, Ramesh
• Ganesh, SNV
• Garg, Atul
• Gomes, Antonio Tadeu
• Goyal, S
• Gr, Kanagachidambaresan
• Gulliver, Stephen
• Gulzar, Dr. Zameer
• Guqhaiman, Ahmed
• Habibi, Mehdi
• Hasan, Dr. Mohammad Kamrul
• Hussian, Syed Bilal
• Isaac, Jesus
• Iwendi, Celestine
• J, Cynthia
• J, Samuel 
• Jabbal, Harvinder 
• Jabbar, Waheb A. 
• Jadhav, Ambaji S
• Jain, Achin
• Jondhale, Sathish
• K, Dr. Ashok Kumar
• Kamal Bashah, Nor Shahniza
• Kamble, Dr. Megha 
• Karthick, S
• Karthik, Karthik Guntha
• Kaur, Inderpreet 
• Kaur, Surinder
• Kayikci, Safak 
• Kesavan, Selvaraj
• Khan, Abdul Raouf 
• Khan, Muhammad Asif
• Khan, Riaz
• Khandare, Nikhil
• Khorshidi, Samira
• Khujamatov, Khalim
• Kiran, Kotaru 
• Kishor, Avadh
• Kovelakuntla, Jamal
• Kulkarni, Anil
• Kumar, Amit
• Kumar, Manoj
• Kumar, Praveen
• Kumar, Rajesh
• Kumar, Sampath
• Kumar, Satendra
• Kumar, Sathish
• Kumar, Sumit
• Kumar, Susat
• Kurni, Muralidhar 
• L, Niranjan
• L, Rajesh
• Lamba, Puneet Singh
• Lee, Hyunsoo
• Liu, Kecheng
• M, Dr.Sridhar
• M, Sathya
• M., Rameshbabu
• Mabanza, Ntima
• Mahajan, Yogesh 
• Mahalakshmi, R
• Maheswar, Rajagopal
• Manivannan, R
• Manoharan, Samuel
• Marques Neto, Manoel 
• Marriwala,  Nikhil 
• Masudin, Ilyas 
• Mathivanan, Sandeepkumar
• Milic, Sasa
• Mir, Shahnawaz Ahmad
• Mohapatra, Hitesh
• Murugesh, Thirumalainambi
• Nafea, Ibtehal
• Nagajyothi, R
• Nagesh, H
• Nakata, Keiichi
• Nautiyal, Lata
• Nayyar, Anand 
• Nicolau, Viorel
• Nisar, Kashif
• Oliveira Passos, Fernanda
• Özsungur, Fahri
• P,  Purusothaman 
• P, Karupusamy
• P, Ushapreethi
• P. , Vijaya
• Padmakumar, Jeeva
• Pandey, Dr Anukul
• Pandi, M
• Papadopoulos, Irena
• Passos, Diego
• Pinheiro, Antonio
• Pires, Paulo
• Ponnekanti, Krishna Prasad
• Pourghomi, Pardis
• Prasad, Shitala 
• Pushpalatha, S
• Putta, Venkata Subbaiah
• R V, Darekar
• R, Anitha
• R, Anto Arockia Rosaline
• R, Arthi
• R. Kebande, Victor
• Rahul, Jagdeep
• Rajabion, Lila
• Rajagopalan, Narendran
• Ram Babu, Naladi
• Ramesh, S R
• Ramu, Arulmurugan
• Ranjan, Nihar
• Rao, Inumula Veeraraghava
• Raskar, Charusheela
• Razalli, Saaidal
• Reinhardt, Delphine
• Rocha, Antonio
• S, Maheswaran
• S, Meenakshi Ammal
• S, Saranya
• S, Selvanayaki
• S, Selvi
• S, Smys
• S, Vamsee
• Saeed, Khalid
• Sain, Mangal
• Sandhu, Moid
• Sangaiah, Arun Kumar 
• Sangwan, Anil
• Saradhi, D.Vijaya
• Saradhi, Vijaya
• Sarkar, Amit 
• Sarma, Subramonian Krishna 
• Sasikala, K
• Seixas, Flávio
• Shah, Mehul
• Shaik, Abdul Matheen
• Shakya, Subarna
• Sharan, Ravi 
• Sharma, Amit
• Sharma, Dipasha
• Shashank Pol, Pooja
• Singh, Amritpal 
• Singh, Meeta 
• Singh, Nanhay 
• Singh, Surjit 
• Singh, Uttam
• Sridevi, Sri
• Srivastava, Vishal
• Suhasa, Suhasa
• Sukanya, Sukanya
• Swetha, Namburu
• Syed, Naeem
• Syed, Shameem
• Sztajnberg, Alexandre
• Tabatabaei, Shayesteh 
• Thamaraimanalan, T.
• Thomas, Renjith
• Thu, Tsi
• Thurasamy,  Ramayah 
• Tvp, Sundararajan
• V, Bindhu
• V, Maheswari
• V, Muthukumaran 
• V, Sridhar Reddy
• V.H, Arul
• V.R., Niveditha
• Vaiyapuri, Thavavel 
• Venkatesan, Dhilipkumar
• Venkatesan, M
• Vig, Vidhi 
• Virgin Louis, Bamila 
• Wagh, Kavita
• Wankhade, Mahesh 
• Wen, Jiahui
• Xu, Minxian
• Yadav, Dileep
• Yadav, Naresh Kumar 
• Yadav, Poonam 
• Yang, Chan-Yun 
• Yin, Wei
• Zambonelli, Franco
• Zarkada, Anna 
• Zhong, Mingyang
• Zubi, J