Identify three mobile OSs and three personal computer OSs. Explain advantages and disadvantages of each one. Describe each OS.

Mobile Os

1.android os-The Android mobile operating system is Google's open and free software stack that includes an operating system, middleware and also key applications for use on mobile devices, including smartphones. 

Advantages

*Third party apps also supported you can also install third party apps where can be downloaded from different websites. 

*runs to variety of mobile models

Most of the phones today runs by an android os. 

*Expandable memory

*Android is an open source os. 

Disadvantages 

*Apps runs in background

*Low specs mobiles run slow. 

*virus protection 

Android is not good at virus protection. Users have rights to download and install apps from other external websites and these apps may contain a virus and stole your data and information

2.Iphone os/IOS-. The iOS mobile operating system is available only on Apple's own manufactured devices as the company does not license the OS for third-party hardware. Apple iOS is derived from Apple's Mac OS X operating system.

*Advantages 

Performance is awesome.

Looks are uber stylish and it became a style quotient.

Generates less heat when compared to Android.

Best gaming experience.

Avast number of applications.

Suits for business and gaming.

Excellent UI and fluid responsive.

The latest version has two notification menus.

Excellent security.

*Disadvantages 

Not flexible only supports iOS devices.

The iOS is not Open Source.

The main disadvantages of using iOS are costly Apps and no widget support.

You cannot change your ringtone but there are many alternatives to do that.

Apple restricted the connectivity with iTunes, luckily we have best iTunes alternatives.

Devices are very pricey.

3.. BlackBerry OS (Research In Motion)-The BlackBerry OS is a proprietary mobile operating system developed by Research In Motion for use on the company's popular BlackBerry handheld devices. 

Advantages 

The BlackBerry Device allows the users to access their mail, text, social media activity and calendar, and provides Internet access through 2g, 3g, and in some devices 4g and Wi-Fi connection. 

Disadvantages 

If you travel a lot in different countries you need special permission to use BlackBerry messenger (BBM), because many countries don't allow BlackBerry messenger (BBM).

Because of the security check software BlackBerry take 5 to 10 minutes to turn on after unplugging the battery.

Computer os

1.Microsoft Windows

Microsoft Windows has existed in one form or another since 1985, and it remains the most popular operating system for home and office computers.

Advantages 

Support for all hardware: As windows OS is used by 95% of users so most of the hardware vendors make drivers for windows.

Software support: Windows platform is best suited for game and software developers

Ease of use: All versions of Microsoft Windows have something common in it which makes users easy to shift from one version to another

Disadvantages

Virus attacks: Windows have a high amount of hacker attacks. The hackers can easily break windows security.

Rebooting a system: If your system becomes slow in performance then you have to reboot it. 

2.Apple iOS

Apple's iOS is one of the most popular smartphone operating systems, second only to Android. It runs on Apple hardware, including iPhones, iPad tablets and iPod Touch media players.

Advantages

1. Simple but powerful user interface: OS X offers a more straightforward approach to computing

2.Fewer viruses and other security issues: One of the advantages of macOS is that it is considerably safer than Windows. 

Disadvantages

Inflexible when it comes to hardware upgrades: A standard Mac computer cannot be upgraded easily because most of its hardware components are integrated both at a design and engineering levels. 

App ecosystem is still lacklustre: Windows has more software or applications. Developers, especially small and independent software companies, often consider building software for Windows first because of greater reach.

3.Linux Operating System

Unlike many other operating systems, development on Linux isn't led by any one company. The operating system was created by Finnish programmer Linus Torvalds in 1991. Nowadays, programmers from all over the world collaborate on its open source code and submit tweaks to the central kernel software and other programs.

Advantages

1.FREEDOM!

Most Linux distros are free..... users do not need to pay for a copy, but this is only one aspect of freedom enjoyed by Linux users! In addition, Linux distros can be freely downloaded and legally installed on as many computers as you want and freely.

2.LINUX IS LESS VULNERABLE TO COMPUTER MALWARE!

Because most computer malware are designed to attack Windows (often through Active X which is not typically found in Linux) the odds are considerably less for Linux to be infected with a virus than Windows [2]. The same holds true with spyware, trojans, and worms.

3.LINUX IS VERY STABLE!

Linux systems rarely crash, and when they do, the whole system normally does not go down. The "blue screen of death" familiar to Windows users is not a worry for Linux users

Disadvantages

1.MANY WINDOWS PROGRAMS WILL NOT RUN IN LINUX.

iTunes, Microsoft Office, Internet Explorer and many other Windows programs will not run natively in Linux. 

2.THERE IS A LEARNING CURVE FOR PEOPLE WHO ARE NEW TO LINUX.

Despite this, most Linux distros, especially the major ones, are very intuitive and user-friendly.