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Lesson 3a - PowerPoint PPT Presentation

Introduction to Computers

Lesson 3A Introduction to Computers Two Kinds of Monitors Cathode ray tube (CRT) Flat-panel display Monitor Categories Based on Color Display Monochrome: One color on a black background Grayscale: Shades of gray on a white or off-white background

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CRYPTOGRAPHY

CRYPTOGRAPHY. LESSON 3A LESSON OBJECTIVES. Lesson 3A. To understand what kind of information is coded onto a QR code To understand the purpose and use of QR codes To use a QR code to communicate information.

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Lesson 3a - PowerPoint PPT Presentation

Introduction to Computers

CRYPTOGRAPHY