Juniper Systems Allegro DOS Manual - Manual (Page 214)

Page 6-8 Technical Reference
Disk-On-Chip (Hard Disk)
A disk-on-chip is a solid state disk drive. The C: drive on the Allegro is a
disk-on-chip. It can be read from and written to just like the hard drive
on a PC but has no moving parts and does not require power to
maintain contents.
Kilobyte
One kilobyte (K or KB) is thought of as one thousand bytes (the actual
figure is 1,024 bytes).
Megabyte
One megabyte (M or MB) is thought of as one million bytes (the actual
figure is 1,048,576 bytes). The Allegro comes with 16 M of RAM and 24
M of disk storage.
PCMCIA Card (PC Card)
PCMCIA is an acronym for Personal Computer Memory Card Interface
Association. When the proper software (device drivers) is installed on
the Allegro, an SRAM card or ATA FLASH card may be inserted in the
slot provided. A PC card may also be a modem, RF transceiver, GPIB
interface or several other possible devices. The Allegro device drivers
automatically detect these devices when they are installed in the PC
card slot.
RAM (Random Access Memory)
RAM is often referred to as the computer's workspace. This is where
programs are executed or run. RAM can be written to, read from,
erased, etc. Its storage ability is temporary in nature, only holding
information while the system has power.
ROM Disk (Read Only Memory)
ROM disks are different from RAM disks in that they are written to only
once; upon original creation. Thereafter, they can only be read from
much like a write-protected floppy disk. If you attempt to write to a
ROM disk the Allegro displays an error message. The ROM drive in the
Allegro is the A: drive.
MS DOS
MS DOS
™ 6.22 is Microsoft Corporation's version of DOS. It is
embedded in the Allegro's ROM (Read Only Memory) and can run
entirely from within ROM.
Windows CE
Windows CE is a compact, scalable operating system from Microsoft
similar to Microsoft Windows running on a desktop PC.