Question: Daisy wheel, Drum, chain etc are the ………….

Answer:

Daisy wheel, drum, and chain are examples of printing mechanisms or technologies used in early typewriters and printers.

1. Daisy Wheel: The daisy wheel is a printing mechanism that was commonly used in typewriters. It consists of a circular disk or wheel with spokes radiating outwards. Each spoke has a character embossed at its tip. When a key is pressed, the corresponding character on the daisy wheel rotates into position, and a hammer strikes the character against an inked ribbon, transferring the ink onto the paper.

2. Drum: The drum is a printing mechanism found in drum printers, which were used in early computer systems. The drum is a cylindrical drum or roller with characters engraved or magnetically charged on its surface. As the drum rotates, the desired character aligns with the paper, and a hammer strikes the paper against the inked ribbon and the character on the drum, creating the printed output.

3. Chain: The chain is a printing mechanism used in some older line printers. It consists of a loop of characters or glyphs arranged on a chain. As the chain moves, the desired character aligns with the paper, and a hammer strikes the paper against the inked ribbon and the character on the chain, producing the printed output.

These printing mechanisms were prevalent in earlier technologies but have become less common with the advancement of printing technologies such as dot matrix, inkjet, laser, and thermal printers. These modern printers offer faster printing speeds, higher print quality, and more versatility compared to the mechanisms mentioned above.