[igCS] Open and Proprietary Software

[igCS] Open and Proprietary Software

Objectives

• distinguish between free software, freeware and shareware

Proprietary Software

• Paid

• Shareware/Freeware

Proprietary Software

• Sometimes referred to closed-source software

• Source code are not disclosed, and usually not allowed to modify or reverse-engineer (work from compiled code to reveal the source code)

In general, the end user:

• Pay for the right to use the software

• which is determined by the software license that:

• Where can the user use it

• How many computers/accounts can use it

• No redistribution of the software

Freeware / Shareware

• They are proprietary software, except that end user are not paying

• How is the developer benefit from this?

• 
  

• 
  

• 
  

Open Ended

Freeware is very common nowadays thanks to inbuilt app store on smartphone, which most apps are free to install. How are those apps benefits from providing free services?

Benefits for freeware developers

• Some freewares are providing limited functions or free for a certain amount of time (usually classify as shareware in this case)

• Advertisement (very common in smartphone apps)

• DLC (which is similar to point 1)

• Malware (e.g. for DDoS), usually associated with pirate software but not limited to (e.g. some people claims that Facebook app is a spyware itself, collecting unnecessary data from user)

Opensource software

• Watch video and, write down some property of opensource software and the benefits of it

• https://www.youtube.com/watch?v=a8fHgx9mE5U&feature=emb_title

• 
  

• 
  

Multiple Choice

Opensource software allows access to source code.

• Yes

• No

Multiple Select

Which of the following is true:

• Opensource software allow user to modify

• Opensource software allow user to distribute

• There is no guarantee the quality of the open source software

• Opensource software is completely free

Open source software

• Sometimes refer as "Free software"

• Source code is opened for public access

• Allow modify, enhance and usually redistribute

Open Ended

People often claims that opensource software is safe from malware. Why?

Examples of opensource software

• Linux (vs Windows, MacOS)

• Android (vs iOS)

Open Ended

Exit question:

Describe the difference between free software and freeware. [2]