Dell PowerVault 770N (Deskside NAS Appliance) - Manual (Page 47)

Acronym for power-on self-test. Before the operating system loads when you turn on your system, the POST tests various
system components such as RAM, the disk drives, and the keyboard.
program diskette set
The set of diskettes from which you can perform a complete installation of an operating system or application program. When
you reconfigure a program, you often need its program diskette set.
protected mode
An operating mode supported by 80286 or higher microprocessors, protected mode allows operating systems to implement:
A memory address space of 16 MB (80286 micro--processor) to 4 GB (Intel386™ or higher micro-processor)
Multitasking
Virtual memory, a method for increasing addressable memory by using the hard drive
The Windows NT and UNIX® 32-bit operating systems run in protected mode. MS-DOS cannot run in protected mode;
however, some programs that you can start from MS-DOS, such as the Windows operating system, are able to put the
system into protected mode.
PS/2
Abbreviation for Personal System/2.
PXE
Acronym for Preboot Execution Environment.
RAID
Acronym for redundant array of independent disks.
RAM
Acronym for random-access memory. The system's primary temporary storage area for program instructions and data. Each
location in RAM is identified by a number called a memory address. Any information stored in RAM is lost when you turn off
your system.
read-only file
A read-only file is one that you are prohibited from editing or deleting. A file can have read-only status if:
Its read-only attribute is enabled.
It resides on a physically write-protected diskette or on a diskette in a write-protected drive.
It is located on a network in a directory to which the system administrator has assigned read-only rights to you.
readme file
A text file included with a software package or hardware product that contains information supplementing or updating the
documentation for the software or hardware. Typically, readme files provide installation information, describe new product
enhancements or corrections that have not yet been documented, and list known problems or other things you need to be
aware of as you use the software or hardware.