<s>
Editors	O
used	O
in	O
the	O
PC	O
environment	O
typically	O
operate	O
in	O
a	O
significantly	O
different	O
manner	O
than	O
those	O
in	O
operation	O
on	O
large	O
Mainframe	B-Architecture
systems	O
.	O
</s>
<s>
PC	O
editors	O
are	O
almost	O
universally	O
character	O
stream	O
oriented	O
while	O
mainframe	B-Architecture
editors	O
are	O
typically	O
text	O
line	O
oriented	O
.	O
</s>
<s>
Users	O
who	O
need	O
to	O
work	O
on	O
both	O
PCs	O
and	O
mainframes	B-Architecture
thus	O
need	O
to	O
become	O
productive	O
in	O
two	O
different	O
work	O
styles	O
.	O
</s>
<s>
SPFlite	B-Application
is	O
a	O
free	O
file	B-Application
manager	I-Application
and	O
text	B-Application
editor	I-Application
which	O
provides	O
,	O
on	O
Windows	B-Application
PCs	I-Application
,	O
a	O
familiar	O
working	O
environment	O
for	O
those	O
who	O
are	O
used	O
to	O
IBM	O
's	O
mainframe	B-Architecture
based	O
ISPF	B-Operating_System
.	O
</s>
<s>
As	O
well	O
as	O
providing	O
the	O
basic	O
ISPF	B-Operating_System
functional	O
compatibility	O
,	O
SPFLite	B-Application
has	O
added	O
extended	O
facilities	O
to	O
enhance	O
editing	O
abilities	O
.	O
</s>
<s>
It	O
is	O
one	O
of	O
several	O
PC	O
versions	O
of	O
the	O
mainframe	B-Architecture
ISPF	B-Operating_System
system	O
,	O
some	O
commercial	O
and	O
some	O
freeware	O
versions	O
.	O
</s>
