Crash Course Computer Science #18 - Operating Systems

What is this episode about?

• punch cards

• computer programmers

• operating systems

• advanced graphics

​ (a)   systems got their start in the ​ (b)   , as computers became more ​ (c)   and more powerful. The very first OSs augmented the mundane, manual task of loading ​ (d)   by hand.

• Operating
• 1950s
• widespread
• programs
• calculations
• fast

Having programs run automatically and near-instantly after one another is called

• group processing

• batch processing

• total processing

• package processing

Devices connected to a computer, such as printers, are called

• peripherals

• extras

• additions

• neighbors

Some of the first operating systems where used to make programming between software and peripheral hardware easier. These are called

• queued code

• stored memory

• program script

• device drivers

In the late 1950s, the University of Manchester started work on a supercomputer called

• Apollo

• Athena

• Atlas

• Augustus

What made the Atlas Supervisor special?

• it ran programs at the same time

• it ran programs very quickly

• it could loop programs

• it created a new program using artificial intelligence

What's the maximum amount of magnetic tape drives the Atlas could use?

Programs might be assigned different blocks of memory, making it challenging for programmers to keep up with. What's the OS's solution?

• OSs will virtualize memory locations

• it reorders the memory so the blocks are physically closer together

• the OS will assume that memory starts at address 0

• the OS will put some programs to "sleep" so it can run faster

​ (a)   allows programs to have flexible memory sizes, called ​ (b)   memory allocation, that appear to be ​ (c)   to them. It is more simple and flexible to the OS running ​ (d)   programs at once.

• Virtual memory
• dynamic
• continuous
• multiple
• systematic
• digital