Digital Electronic Computer

In computer since, A digital electronic computer is a computer machine which is both an electronic computer and a digital computer 

Examples -: 

Apple Macintosh

IBM PC

Modern Smartphones

 
When computers that were both digital and electronic appeared, they displaced almost all other kinds of computers. but computation has historically been performed in various 

non-digital and non-electronic

Example of a digital non-electronic computer - Lehner sieve

While analog computers are examples of non-digital computers

Which can be electronic, and mechanical computers are examples of non-electronic computer

An example of a computer which is both non-digital and non-electronic is the ancient Antikythera mechanism Found in Greece. all kinds of computers, whether they are digital or analog, and electronic or non-electronic, can be Turing complete if they have sufficient memory. A digital electronic computer is not necessarily a programmable computer, a stored program computer, or a general purpose computer, since in essence a digital electronic computer can be built for one specific application and non-programmable.

A digital computer can perform its operation in the decimal system, in binary , in ternary or in other numeral systems.

As of 2019,

            All digital electronic computers commonly used, whether personal computers or sever computers or super computers, are working in the binary number system and also use binary logic. A few ternary computers using ternary logic where built mainly in the soviet union as research projects.

Digital computers are inherently best described by discrete mathematics, while analog computers are most commonly associated with continuous mathematics. The philosophy of digital physics views the universe as being digital. Konrad Zuse wrote a book known as Rechnender Raum in which he described the whole universe as one all encompassing computer.