Personal Finance Management (PFM) specifically refers to the use of software and digital tools to organize, track, and analyze an individual's or family's financial activities, including budgeting, expense tracking, investment monitoring, and financial planning. E-commerce involves buying and selling goods online. Social Networking focuses on online interaction and community building. Computer-Aided Design (CAD) is used for creating technical drawings and designs, typically in engineering and architecture. Therefore, PFM is the most accurate term for the described activity.

A program contains the instructions that tell the computer what actions to perform.

Minicomputers, emerging in the 1960s, were designed to be more affordable and accessible than mainframes. While not as powerful as mainframes, they offered significantly more processing capability and multi-user support than the nascent microcomputers (personal computers) of their era. This 'midrange' capability made them ideal for departmental use within large organizations, as well as for small to medium-sized businesses and scientific applications, effectively bridging the gap between the colossal mainframes and desktop machines.

The hexadecimal number system is defined by its base of 16. This means it utilizes 16 unique symbols to represent numerical values. These symbols include the digits 0 through 9, and the letters A through F (where A represents 10, B represents 11, and so on, up to F representing 15). Hexadecimal is widely used in computer science as a more compact and human-readable way to represent binary data, as each hexadecimal digit can represent exactly four binary digits (bits).

When a computer consistently performs the same task without making any mistakes, it demonstrates two crucial characteristics. 'Diligence' refers to its ability to work continuously and repetitively without fatigue or loss of concentration, unlike humans. 'Accuracy' refers to its precision and the absence of errors in its calculations or operations. Both attributes are simultaneously at play when a computer flawlessly repeats a task. While 'versatility' (option A) is another significant characteristic of computers, it pertains to their capacity to perform diverse tasks, not the error-free repetition of a single task.

The ENIAC (Electronic Numerical Integrator and Computer) was the first general-purpose electronic digital computer. While it processed numbers using a decimal system rather than binary in its internal arithmetic, its fundamental operation was based on discrete numerical values, making it 'digital.' This distinguishes it from analog computers which represent data as continuously varying physical quantities, and mechanical computers which rely on physical gears and levers.

A Personal Shopping System (PSS) lets customers scan items for instant pricing and promotions.

Electronic Funds Transfer (EFT) is the correct answer. It is a comprehensive system that enables the electronic movement of money between financial institutions or accounts. Examples of EFT include direct deposit of paychecks, online bill payments, wire transfers, and automated teller machine (ATM) transactions. Option A, Optical Mark Recognition (OMR), is a technology used to read human-marked data from documents, like surveys or tests, and is unrelated to financial transfers. Option B, Electronic Commerce (E-commerce), refers to the buying and selling of goods and services, or transmitting funds or data, over an electronic network, primarily the internet. While EFT is a component that enables e-commerce, e-commerce itself is a broader concept of online business, not the specific system for funds transfer. Option D, Core Banking System (CBS), is a centralized system used by banks to manage their main operations, such as account management, loan processing, and customer relationship management. While CBS facilitates EFT services, it is the underlying platform for all banking operations, not the specific term for electronic fund transfers.

Data storage units are organized hierarchically based on their capacity. Starting from the smallest common unit listed and moving to the largest: * **Kilobyte (KB):** Approximately 1,024 bytes. * **Megabyte (MB):** Approximately 1,024 Kilobytes (KB). * **Gigabyte (GB):** Approximately 1,024 Megabytes (MB). * **Terabyte (TB):** Approximately 1,024 Gigabytes (GB). Therefore, a Terabyte (TB) represents the largest amount of data among the options provided, as 1 TB is roughly equivalent to 1,000 GB.

RAM stands for Random Access Memory. It is a form of computer memory that can be read and changed in any order, meaning data can be accessed directly by its physical address rather than sequentially. This characteristic allows for quick data retrieval, making it crucial for storing actively used programs and data, which directly impacts a computer's performance and responsiveness.