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PLM is the process of managing the entire lifecycle of a product from its conception, through design and manufacture, to service and disposal. PLM integrates people, data, processes and business systems and provides a product information backbone for companies and their extended enterprise.

PDM is part of PLM.  It is the use of software or other tools to track and control data related to a particular product. The data tracked usually involves the technical specifications of the product, specifications for manufacture and development, and the types of materials that will be required to produce goods.  The use of product data management allows a company to track the various costs associated with the creation and launch of a product. 

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CAD is the use of computer technology for the process of design and design-documentation. CAD software, or environments, provides the user with input-tools for the purpose of streamlining design processes; drafting, documentation, and manufacturing processes.

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Creo Elements/Pro

Creo Elements/Direct

Creo Elements/View

Abortext Isodraw

CAM is the use of computer software to control machine tools and related machinery in the manufacturing of workpieces.  CAM may also refer to the use of a computer to assist in all operations of a manufacturing plant, including planning, management, transportation and storage.  Its primary purpose is to create a faster production process and components and tooling with more precise dimensions and material consistency, which in some cases, uses only the required amount of raw material (thus minimizing waste), while simultaneously reducing energy consumption.

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Pro/NC

Vericut

Moldex

GPost

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Mechanica

MSC Products

Mentor Graphics

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Objet 3D