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Today, even where ER modeling could be useful, it is uncommon because many use tools that support similar kinds of model, notably class diagrams for OO programming and data models for relational database management systems. Some of these tools can generate code from diagrams and reverse-engineer diagrams from code.
The enhanced entity–relationship (EER) model (or extended entity–relationship model) in computer science is a high-level or conceptual data model incorporating extensions to the original entity–relationship (ER) model, used in the design of databases.
An online store may also be called an e-web-store, e-shop, e-store, Internet shop, web-shop, web-store, online store, online storefront and virtual store. Mobile commerce (or m-commerce ) describes purchasing from an online retailer's mobile device-optimized website or software application ("app").
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This diagram type is also known as FMC Block Diagram; Dynamic Structure Diagram depicts processes that can be observed in a system. This diagram type is also known as FMC Petri-net; Value Range Structure Diagram depicts structures of values found in the system. This diagram type is also known as FMC E/R Diagram; All FMC diagrams are bipartite ...
Generally, transactions in this model occur via online platforms (such as PayPal), but often are conducted using social-media networks (e.g., Facebook marketplace) and websites (Craigslist). [2] The advantages of C2C include: [citation needed] Availability: It is always available so consumers can shop on demand; Websites are updated regularly;
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1984: Gateshead SIS/Tesco is first B2C online shopping system [76] and Mrs Snowball, 72, is the first online home shopper [77] 1984: In April 1984, CompuServe launches the Electronic Mall in the US and Canada. It is the first comprehensive electronic commerce service. [78]