CS101 Lecture 5 Computer Software. Software Software is a set of instructions for the computer to follow to accomplish a task. Two main types of software.

CS101 Lecture 5

Computer Software

Software

• Software is a set of instructions for the computer to follow to accomplish a task.

• Two main types of software are…– 1) Operating System– 2) Applications

Applications

• Applications (also called Programs) = Instructions for the computer on how to do certain functions under the control of the operating system

• Examples Of Applications:– Firefox– Microsoft Word– Halo

Operating System

• Set of instructions that controls all hardware and software on the computer

iClicker Poll

• That kind of computer do you use for your college work?

a) Windows

b) Mac

c) Linux

d) Google Chrome OS (Chrombook)

e) Don’t use a computer to complete my college work.

iClicker Poll

• That version of Windows?a) Windows 8

b) Windows 7

c) Windows Vista

d) Windows XP

e) Not Sure

iClicker Poll

• That version of Mac OSX?a) 10.10 Yosemite

b) 10.9 Mavericks

c) 10.8 Mountain Lion

d) 10.7 Lion

e) Not Sure

iClicker Poll

• That kind of computer would you buy today?

a) Windows

b) Mac

c) Linux

d) Chromebook

e) Other

Operating System Current Usage Percentage

• http://en.wikipedia.org/wiki/Usage_share_of_operating_systems#Desktop_and_laptop_computers

Who cares who runs your device?

iClicker Poll

• Who is the richest person in the world?a) The King of Saudi Arabia

b) Mark Zuckerberg

c) Bill Gates

d) Tom Cook

e) Warren Buffett

Who cares who runs your device?

Everyone else has to go through them to get to you.

What does that mean?The tale of IBM and Netscape

What is an open or closed system?

• Open = No one owns the rights to making a computer with that operating system installed on the computer.

• Closed = Someone dose own the rights to making a computer with that operating system on the computer.

Four most popular current desktop operating systems

• 1 Windows– Controls an open system

• 2 Macintosh OS X– Controls a closed system

• 3 Linux– Is an open and open source operating system

Open source = Anyone can have source code– Example is the Ubuntu operating system we will be using in lab

Chrome OS (Google) is built using Linux

What explains the Mac and Windows Stereotypes?

Is it and Open or Closed System?

Windows runs an open system

• Open System = No one owns the rights to the hardware configuration that makes up a Windows computer.

• Good

• Bad

Macintosh OSX runs a closed system

• Closed system = Apple owns the rights to the hardware configuration of an Apple computer (Macintosh)

• Good

• Bad

Why is Chrome OS starting to catch on?

• Open system:– Cheap– Google make money on your data

Evolution of the operating system interface

Douglas Engelbart

New user interfaces?