1. Data Encryption - Purpose, use of encryption, and types. 2. Mobile Phone Devices - Input and output devices for voice calls, diagram labeling. 3. Utility Software - Functions like compression, backup, and anti-malware software. 4. Compression of Files - Kasuni compressing files for easier uploading and storage optimization. 5. Website Design and File Size - Impact of reducing file sizes on user experience. 6. Transaction Tracking - Impact of online tracking on user information and privacy.