Central Bureau of Investigation. The Central Bureau of Investigation (CBI) is the premier investigating agency of India. Operating under the jurisdiction of the Ministry of Personnel, Public Grievances and Pensions, the CBI is headed by the Director.

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Full Form of CBI: Central Bureau of Investigation

Explanation:
The Central Bureau of Investigation (CBI) is the premier investigative agency of India. It is an autonomous agency under the jurisdiction of the Ministry of Personnel, Public Grievances, and Pensions. The CBI is responsible for investigating various crimes, including corruption, economic offenses, and special crimes.

Key Functions of CBI:
The CBI performs a wide range of functions to maintain law and order and ensure justice in the country. Some of its key functions include:

1. Investigation: The CBI investigates complex cases involving corruption, economic crimes, and other serious offenses. It has the power to conduct searches, make arrests, and gather evidence to bring the culprits to justice.

2. Prosecution: The agency is responsible for preparing and presenting the prosecution case in courts. It works closely with the legal system to ensure effective prosecution and conviction of the accused.

3. Intelligence Gathering: The CBI collects and analyzes intelligence related to various crimes. It maintains a network of informants and collaborates with other intelligence agencies to gather crucial information.

4. International Cooperation: The CBI cooperates with international law enforcement agencies for the exchange of information and mutual assistance in criminal investigations. It participates in joint operations and extradition proceedings to tackle transnational crimes.

5. Training and Capacity Building: The CBI provides training and capacity building programs to its officers and personnel to enhance their investigative skills and knowledge. It also conducts workshops and seminars to promote best practices in investigation techniques.

6. Public Awareness: The CBI works towards creating awareness among the public about various crimes and their consequences. It educates the public about their rights and the importance of reporting crimes to the agency.

Full Form of PDF: Portable Document Format

Explanation:
The Portable Document Format (PDF) is a file format developed by Adobe Systems in the 1990s. It is a widely used format for exchanging and presenting electronic documents. PDF files can contain text, images, graphics, and other elements in a format independent of software, hardware, or operating system.

Key Features of PDF:
PDF files have several key features that make them popular and widely used:

1. Platform Independence: PDF files can be viewed and printed on any device or operating system without the need for specific software or fonts. This ensures that the document's layout and formatting remain consistent across different platforms.

2. Security: PDF files can be encrypted and password-protected, providing a level of security to prevent unauthorized access or modifications. This is particularly useful when sharing sensitive or confidential documents.

3. Compact Size: PDF files can compress large amounts of data, resulting in smaller file sizes. This makes it easier to store, transfer, and share documents without compromising their quality.

4. Readability: PDF files preserve the formatting and layout of the original document, ensuring that the content remains intact regardless of the software or device used to view it. This makes PDFs ideal for sharing documents that need to be viewed or printed as intended.

5. Interactivity: PDF files can include interactive elements such as hyperlinks, bookmarks, and form fields. This allows users to navigate through the document, access external resources, and fill out forms electronically.

6. Accessibility: PDF files can be made accessible to individuals with disabilities. Features like text-to-speech conversion, tags, and alternative text for