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2. 1 Introduction

This chapter entails the theories and nomenclatures used by the advocates to construct and plan the computerized system.

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A theoretical model is a aggregation of interconnected constructs. A theoretical model consists of constructs together with their definitions and bing theories that are used for your peculiar survey. The Theoretical Framework must show an apprehension of theories and constructs that are relevant to the subject of the research. [ THEFR ]

The Purpose of Point of Sale System with Inventory System for Qualipure H2O station is to come on the truth and the effectivity of the present manual stock list system used by the company. The system aimed to increase the gross revenues and cut down the disagreements. It besides provides an efficient and convenient manner of recording of informations and to hold a faster and complete study coevals.

2. 2 Information technology Footings

Information Technology Concept
Information engineering refers to the aggregation of tools that make it Easier to utilize. create. manage and exchange information. The Internet is the latest of a long series of information engineerings. which includes printing. mail. wireless. telecasting and the telephone. [ CEDU ]

Graphical User Interface

A GUI ( Graphical User Interface ) is a user interface to a computing machine. As you read this. You are looking to GUI of your peculiar web browser. The term came into being because the first synergistic user interface to computing machines were non graphical ; they were text-and-keyboard oriented and normally consisted of bids you had to retrieve and computing machine responses that were infamously brief.

Database Management System

A Database Management System ( DBMS ) is a package bundle
With computing machine plans that controls the creative activity. care. and usage of database. It allows organisation to handily develop databases for assorted applications. A database is an incorporate aggregation of information records. files. and other objects. A DMBS allows different user Application plans to concurrently entree the same database. [ WDBMS ]

Standardization

In relational Database Design. the procedure of forming informations to minimise redundancy. Normalization normally involves spliting a database into two or more tabular arraies and specifying relationships between the tabular arraies. [ WTNN ] First Normal Form ( 1NF ) :

Each field in a tabular array contains different information. For illustration. in an employee list. each tabular array would incorporate merely one birthdates field. Second Normal Form ( 2NF ) :
Each field in a tabular array that is non a clincher of the contents of another field must itself be a map of the other Fieldss in the tabular array. Third Normal Form ( 3NF ) ;
No Duplicate information is permitted. For illustration if two tabular arraies both require H2O field. the information would be separated into a separate tabular array.

Windows 7

Is a personal computing machine runing system developed by Microsoft. A version of Windows NT. Development of Windows 7 occurred every bit early as 2006 under the codename “Blackcomb. ” Windows 7 was released to fabricating on July 22. 2009. [ 8 ] and became by and large available on October 22. 2009. [ 9 ] less than three old ages after the release of its predecessor. Windows Vista. Windows 7’s waiter opposite number. Windows Server 2008 R2. was released at the same clip.

Microsoft Visual C #
Is a programming linguistic communication that is designed for constructing a Assortment Of applications that run on the. Net Model. C # is simple. powerful. type-safe. and object-oriented. The many inventions in C # enable rapid application development while retaining the expressiveness and elegance of C-style linguistic communications.

Microsoft Access
Besides known as Microsoft Office Access. is a database direction system from Microsoft that combines the relational Microsoft Jet Database Engine with a graphical user interface and software-development tools. It is a member of the Microsoft Office suite of applications. included in the Professional and higher editions or sold individually.

Point of Sale ( POS )
Besides called POS or check-out procedure. during cybernation subsequently going electronic point of sale or EPOS ) is the topographic point where a retail dealing is completed. It is the point at which a client makes a payment to the merchandiser in exchange for goods or services. At the point of sale the retail merchant would cipher the sum owed by the client and supply options for the client to do payment. The merchandiser will besides usually publish a reception for the dealing.

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