Chapter 8 & 9

Chapter 8: Digital Storage

Hard disk function:

·          To store data.

·          Parts in hard disk:

·        There is 2 type of hard disks.

	Internal Hard disk	External Hard disk
Portability	No	Yes
Price	Less expensive	More expensive
Speed	Fast	Slow
Size	Big	Small

• Head crash occurs when read-write head land on the rotating platter. It gives damage to the magnetic film on the disk surface.

• Flash drives also called as pendrives and thumb drives.

• Memory card also called card reader that can insert into laptop, digital camera, smartphone etc.

Chapter 9: Operating Systems

• This link below tells about:

1. Introduction to Operating System (OS)
2.  What is an Operating System (OS)
3.  Types of Operating System (OS)
4.  Functions of Operating System (OS)
5.  Goals of Operating System (OS)

https://www.youtube.com/watch?v=vBURTt97EkA