Here are the common terms use with there definitions.

• AC-DC - Type of power supply, AC input with DC Output
• ATE - Automated Test Equipement
• CC - Contant Current Mode. Electronic load setting
• CR - Constant Resistance Mode. Electronic load setting
• CV - Constant Voltage Mode
• CP - Constant Power Mode
• DC-DC - Type of power supply, DC input with DC Output
• DVM - Digital Volt Meter. A voltmeter is an instrument used for measuring the electrical potential difference between two points in an electric circuit.
• EEPROM - EEPROM also written E2PROM stands for Electrically Erasable Programmable Read-Only Memory EEPROM a type of non-volatile memory used to store small amounts of data that must be saved when power is removed, e.g., calibration tables, power supply information like serial number, manufacturing date, firmware revision, configuration
• FRU - Field Related Units. Power supply information are stored here like serial number, manufacturing date, firmware revision. This will be use to track return units. This data will be stored in EEPROM
• VPD - Valid Product Data
• GPIB - General Purpose Interface Bus. A most common interface bus to interconnect equipment. IEEE-488 is a short-range, digital communications bus specification that has been in use for over 30 years. Originally created for use with automated test equipment, the standard is still in wide use for that purpose. IEEE-488 is also commonly known as HP-IB (Hewlett-Packard Interface Bus) and GPIB (General Purpose Interface Bus). IEEE-488 allows up to 15 devices to share a single eight-bit parallel electrical bus by daisy chaining connections. The slowest device participates in control and data transfer handshakes to determine the speed of the transaction. The maximum data rate is about one Mbyte/s in the original standard, and about 8 Mbyte/s with later extensions. The IEEE-488 connector has 24 pins. The bus employs 16 signal lines — eight bi-directional used for data transfer, three for handshake, and five for bus management — plus eight ground return lines.
• ICT - In Circuit Tester. A bed of nails tester is a traditional electronic test fixture which has numerous pins inserted into holes in an Epoxy phenolic glass cloth laminated sheet (G-10) which are aligned using tooling pins to make contact with test points on a printed circuit board and are also connected to a measuring unit by wires. Named by analogy with a real-world bed of nails, these devices contain an array of small, spring-loaded pogo pins; each pogo pin makes contact with one node in the circuitry of the DUT (Device Under Test). By pressing the DUT down against the bed of nails, reliable contact can be quickly, simultaneously made with hundreds or even thousands of individual test points within the circuitry of the DUT. The hold-down force may be provided manually or by means of a vacuum pulling the DUT downwards onto the nails. Devices that have been tested on a bed of nails tester may show evidence of this after the fact: small dimples (from the sharp tips of the pogo pins) can often be seen on many of the soldered connections of the PCB. Typically, four to six weeks are needed for the manufacture and programming of such a fixture. Fixture can either be vacuum or press-down. Vacuum fixtures give better signal reading versus the press-down type. On the other hand, vacuum fixtures are expensive because of their high manufacturing complexity
• MDA - Manufacturing Defect Analyzer. A basic in circuit tester, check shorts, open connection, resitance, capacitance and inductance. The difference between ICT and MDA is that MDA is not capable on functional test of the component.
• OCP - Over Current Protection. See how this test is performed here
• OVP - Over Voltage Protection. See how this test is performed here
• OPP - Over Power Protection
• MCU - Micro Controller Unit. Most power supply nowadays are embedded with an microcontroller unit. Some power supply have 2 or MCU inside which check controls and monitor power supply behavior. In this case, each microcontroller unit has its own function and area to monitor, like one microprocessor is in charge on the primary side of the power supply which monitor input behavior and flag faults and status. Another microcontroller for the output which monitors all faults in the output side of the power supply.
• I2C - Inter Integrated Circuit is a multi-master serial computer bus invented by Philips that is used to attach low-speed peripherals embedded system. I²C uses only two bidirectional open-drain lines, Serial Data Line(SDL) and Serial Clock (SCL), pulled up with resistors. Typical voltages used are +5 V or +3.3 V although systems with other, higher or lower, voltages are permitted. The I²C reference design has a 7-bit address space with 16 reserved addresses, so a maximum of 112 nodes can communicate on the same bus. Common I²C bus speeds are the 100 kbit/s standard mode and the 10 kbit/s low-speed mode, but arbitrarily low clock frequencies are also allowed. Recent revisions of I²C can host more nodes and run faster (400 kbit/s Fast mode, 1 Mbit/s Fast mode plus or Fm+, and 3.4 Mbit/s High Speed mode); those speeds are more widely used on embedded systems than on PCs. There are other features, such as 10-bit addressing.
• sDA - Data line on I2C Bus
• sCL - Clock line on I2C Bus
• PSMI - Power Supply Management Interface. Power Supply Management Interface (PSMI) Design Guide has an extensive amount of management information that can be exchanged between a host computer and power supplies across a local SMBus connection.
• PMBus - Power Management Bus The Power Management Bus (PMBus) is an open standard power-management protocol with a fully defined command language that facilitates communication with power converters and other devices in a power system. See more info here
• SPI - Serial Pheriperal Interface. The Serial Peripheral Interface Bus or SPI bus is a synchronous serial data link standard that operates in full duplex mode. Devices communicate in master/slave mode where the master device initiates the data frame. Multiple slave devices are allowed with individual slave select (chip select) lines. Sometimes SPI is called a "four wire" serial bus, contrasting with three, two, and one wire serial buses. The SPI bus specifies four logic signals. SCLK - Serial Clock (output from master); MOSI/SIMO - Master Output, Slave Input (output from master); MISO/SOMI - Master Input, Slave Output (output from slave); SS - Slave Select (active low; output from master)
• SWU - Switch Control Unit. This is a type of equipment commonly used in a Automated Test System which main function is to mulitplex signals. This has an option also on general purpose relays and digital io.
• RoHS - Restriction of Hazardous Substances
• UUT - Unit Under Test
• DUT - Device Under Test
• Resident Unit - Unit resides with fixture use for current sharing test.
• SMB Alert - SMB Alert is a digital signal pin from the power supply. A normally low state digital signal in a normal operation of the power supply. Once fault occured in the power supply, this signal will have a transistion from low to high which allows the end user application or the host system to determine that theres a fault generated inside the power supply. This signal can be deasserted by sending a command from a host system to the power supply. This signal will not go back to low state even the fault was removed only unless either of the step are done - reset input or send deassert command.