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378 EMS memory

A unit of as many as 3 characters, preceded by a

period, that is sometimes appended to a filename

by an application or other program, and is at other

times required. For example, MS-DOS batch

programs must always have the filename

extension .BAT. See also filename.

EMS memory

A type of expanded memory

available on systems that conform to the

Lotus/Intel/Microsoft Expanded Memory

Specification (LIM EMS).

Enhanced workstation

See LAN Manager

Enhanced.

gateway

A piece of network hardware that

expanded memory

Usable memory beyond the

connects networks together to create an

internetwork. Also called a router.

conventional memory limit of 640K for MS-DOS.

MS-DOS applications that correspond to the

Lotus/Intel/Microsoft (LIM) expanded memory

specification can use expanded memory. The

EMM386.EXE device driver accesses expanded

memory.

high memory area (HMA)

The first 64

kilobytes of extended memory.

extended memory

Memory from 1 MB

HMA

See high memory area (HMA).

(10,245K) to 16 MB (16,384K). Extended

memory can be used with MS-DOS. The

MS-DOS HIMEM.SYS device driver loads

LAN Manager software into extended memory.

home directory

A directory on a server that is

accessible to the user and contains files and

programs for that user. A home directory can be

assigned to an individual user or can be shared by

many users.

FAT

See File Allocation Table (FAT).

host computer

See remote.

File Allocation Table (FAT)

An MS-DOS and

host name

See computername.

OS/2 file system that tracks the location of files in

directories. The file allocation table also allocates

free space on disks to ensure that space is

available for new files. OS/2 version 1.2 and later

can replace the FAT file system with an

installable file system (IFS), such as the high-

performance file system (HPFS).

host table file

See HOSTS file.

HOSTS file

The file used by TCP/IP in which

computernames and their corresponding IP

addresses are stored. See also IP address.

HPFS

High-performance file system, primarily

used with the OS/2 operating system version 1.2

or later. HPFS has faster input/output (I/O) than

the FAT file system, does not restrict file naming

to 8 characters with a 3-character extension, and

is compatible with the file allocation table (FAT)

file system. When you install LAN Manager

server software on an HPFS partition, it becomes

an HPFS386 partition. See also File Allocation

Table (FAT).

file system

In an operating system, the overall

structure in which files are named, stored, and

organized.

filename

A unique name for a file. Under the

FAT file system, a filename can have as many as

8 characters, followed by a filename extension

that consists of a period (.) and as many as 3

characters. With the OS/2 version 1.2 and later

high-performance file system (HPFS), a filename

can have as many as 254 characters. See also

filename extension.

HPFS file system

See HPFS.

filename extension

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