Answer:
The Internet
Explanation:
Why? The internet has done twice if not thrice what the printing press has done. The printing press allowed for dissemination of information and knowledge to the population through its mechanical movable printing capability and speed of book publishing. However its reach was highly limited by the physical attributes of the machines and having to transfer books and papers in spreading them to certain destinations. This limitation has been eliminated by the internet as one is able to receive a book written today in seconds and not physically but through electronic means. In other words, information need not be transferred physically, also accessbility and cost of getting information has been highly improved with the internet.
Answer:
polymorphic
Explanation:
An example of polymorphic reference, suppose you have 3 classes: Main, Product and SpecificProduct. If SpecificProduct extends Product this means it is a product class but with something else to complement.
Say you want to reference an object of product in the main class, you can do it the classic way:
Product pd = new Product();
Or you can do it polymorphic, like this:
Product pd = new SpecificProduct();
The program will accept just fine because SpecificProduct is extending Product. When you do it like this, we say the reference you made was a polymorphic reference
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