What is PLC?

PLC stands for Product Life Cycle.

7 stages of PLC are:

• Analysis
• Design
• Development
• Testing
• Implementation
• Maintenance
• EOL(End-of-life)*.

Why PLC is used?

• It helps to products are created and delivered in time.
• Makes Quality of product is high
• Return on investment is maximized

*End-of-life (EOL) is the stage for the end of a project. EOL consists of carrying out all the necessary tasks to ensure that the customers and employees are aware that a product is no longer sold and supported and that a new product is available.

Dennis Ritchie

He is a founder of C Programming Language and Unix OS.


Phsically he is dead but i think that:


He lives until the Unix OS and the C programming language is used....

The Creature bless you and all the people like you ;).


Dennis Ritche's great shadow always is seen on every kernels which belongs to unix shells :)
do you read his article about unix OS which belongs to the beginning years of 1970s. (When you search on ACM Digital Library, you can reach and may  buy)

I hope that, God very very bless you Mr. Ritche!

The C Programming Language

This book is the sacred book of the programming for C beginners.

Many programmers translate this book own native languages.

Every main rule are explained with the good samples. Authors are fathers of C.

1978 is the first publishment year of this book.  Popularity of C Language played a big role on changes and inprovements of C.

From variables and expressions of C to the Unix System Interface and Standartd Library, this books gives an information for begginers, students and programmers.


Now everybody who are using unix operating system, it  thanks to Kernighan and Ritchie.


Regards,
Arzu

categorization classification from past to future

Doctors were divided into 4-5 groups approximately 50 years ago. But now, improvements on science and technology are growing up quickly and more faster than Earth's speed :) around the sun.

it comes to the other fields such as engineering, textile, food, agriculture, energy, the specialization was divided into many different areas.

Where we are going?

20 years later, how many different research areas are born and grow up?

I'm wondering..