Job Recruitment Website - Job information - What information transmission methods have existed since ancient times?
What information transmission methods have existed since ancient times?
2. Letters, through the letter posted by the postman and the credit language, convey information to specific objects, exchange thoughts and feelings, and write letters to relatives and friends in person, which can not only convey thoughts and feelings, but also give the recipient a sense of intimacy.
3. Telegraph is an instant long-distance communication method, which is sent in the form of electric signal through special exchange line. Signals are coded, not words and numbers, and the commonly used code is Morse code.
4. The telephone transmits voice in two directions through electrical signals, and is set at the user end at the beginning and end of telephone communication, which can conveniently realize the conversation and dialogue between end users.
5, computer, database-based management system, computer technology to help managers improve decision-making level and improve business strategy. Information processing includes a series of work such as data collection, storage, processing, classification, collation, retrieval and release. ?
- Previous article:Which position in the Internet industry is more promising?
- Next article:Where can I find a list of guardian liability insurance?
- Related articles
- 20 15 when is the written examination time for the recruitment examination of xinji city institutions in Shijiazhuang, Hebei?
- Where is Maozi Street in zhouxiang town, Cixi City?
- On humanistic care
- Did you buy it at the stone carving machine in Changsha?
- How about Danyang Wuyue Good Boy Kindergarten?
- Brief introduction of Lianyungang Second People's Hospital
- How many guards were there in ancient yamen?
- Does the fire brigade need culture when driving?
- Is the Chua's campus in Licheng No.2 Middle School public?
- How to write attractive recruitment information?