Communications
Subjects / Additional Science / OCR 21st Century Additional Science A
The history of communication dates back to the earliest signs of life. Communication can range from very subtle processes of exchange, to full-blown conversations and, especially in our current time, mass communication. Human communication was revolutionised by speech about 200,000 years ago. Symbols were developed about 30,000 years ago, and writing about 7,000 years ago. On a much shorter scale, there have been major developments in the field of telecommunications in the past few centuries. Most of these developments have revolved around the discovery of electricity. From postal services to telegrams to telephones, most of this revolution was powered by the analogue signal. There has been another revolution in recent years as digital communications have become widely used. In this title, we'll examine what makes these signals what they are and the impact they have on us.
| Author: | Joe Rowing | Publisher: | GCSEPod® |
| Narrator: | Pauline Addis | ISBN: | 978-1-84906-298-5 |
| Video ISBN: | 978-1-84906-798-0 |
Chapters
- Analogue and Digital Signals
- Optical Fibres and Communications
Exam Board Relevance
- Edxcel
- AQA
- CEA
- IGCSE (EdExcel)
- OCR
- SQA
- WJEC
- IGCSE (CiE)
Includes original GCSEPod image art. Additional pictorial images created by Damon Smith
Curriculum and Exam Board Information
Key Issues
Titles
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