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Grade 9 ICT(CAIE) by Rinkon Biswas
Chapter 4: Networks
4.1 Common Network Devices
4.6 Security Issues
Cryptography , Encryption(cipher) and Decryption(decipher)
4.2 Wifi and Bluetooth
Bluetooth VS WiFi
Excel
Excel Task 2
SpecSSD
SpecInvoice
Effects of ICT
Health Issues