IBM 5150 User Manual

File Specifications
The other thing that DOS needs to know to find
information is "Where" -that is, which drive contains
the diskette that has a particular file on it.
The
drive specifier is a letter and a colon, like A:, and it
tells where the file is. You always need to type the colon
after the drive specifier letter.
The filename and extension immediately follow the drive
specifier, like this:
A:81PRICES.JUL
Don't put any spaces between the three parts. These
three parts together-the drive specifier, the filename,
and
the extension -are called a file specification.
Sometimes you don't have to type the drive specifier;
whenever the drive specifier is the same as
the default
drive, you don't have to type it.
For example, assume A: is the default drive (remember
you can tell by looking at the prompt-A> in this case).
Then you could type
~ .... ------ Look-no drive
a:address OR address specifier!
They are exactly the same to DOS when A: is the
default drive.
Here are some more file specifications:
A:81PRICES.AUG
A:KIKI.J
B:BOWl.BAS
B:MINE
YOURS ~ With this kind of file specification, DOS r"".,
assumes that the file (YOURS) can be
found on the default drive.
DOS 3-40

IBM 5150 Specifications

General

Processor	Intel 8088
Clock Speed	4.77 MHz
RAM	16 KB - 256 KB
Manufacturer	IBM
Model	5150
Release Year	1981
Storage	5.25-inch floppy drives
Graphics	MDA or CGA
Operating System	IBM PC DOS
Ports	Cassette, keyboard
Expansion Slots	5