<h3><strong>Q1.What do you mean by freeware software?</strong></h3>
=Freeware is available for free.But it doesnt mean that its source code is available for Modification.

Free Software-Free software is available for free to run,modify and redistribute.

Freeware-Acrobat reader

<img class="alignnone" src="https://i2.wp.com/media.techhamlet.com/wp-content/uploads/2009/08/freeware.png" alt="" />

-freeware may have some restriction.Free software No restriction example c-library.Q2.What do you mean by Open Source software?<h3><img class="alignnone" src="https://esdlash.files.wordpress.com/2015/10/0c217-op.jpg?w=440" alt="" /></h3>
=Software whose source code is available for modification freely is called as open source software.

ex- Linux kernel Source code .

<img class="alignnone" src="https://esdlash.files.wordpress.com/2015/10/0c217-op.jpg?w=304&amp;h=166" alt="" width="304" height="166" />

-&gt;Programmers can charge for “open source” softwares,

-&gt;Open source software licensing gives permission to modify,copy and redistribute source code.