Comparative Anatomy of Operating Systems

 

The following table is a non-rigorous rating of different operating systems, meant more for discussion than reference.

Operating System/Feature

Process Scheduling &

Concurrency

Process Synchronization &

Concurrency

Protected Memory

Virtual Memory

File System Complexity

Security & Protection

Networking

User Interface

Use of Open Standards

DOS

1

0

0

0

3

0

0

2

2

Windows 3.11

4

2

2

3

4

2

4

6

3

Windows 95

5

4

5

6

5

3

5

9

4

Windows NT

7

6

7

8

8

6

6

6

5

OS/2

7

8

8

8

7

5

6

8

6

MacOS 7

5

6

2

4

6

6

6

9

6

"Best of" UNIX

9

9

9

9

9

7

9

7

10

VMS

9

9

9

9

8

9

7

7

5