<s>
The	O
148	O
and	O
138	O
,	O
both	O
of	O
which	O
were	O
withdrawn	O
November	O
1	O
,	O
1983	O
,	O
were	O
marketed	O
as	O
followups	O
for	O
those	O
wishing	O
to	O
upgrade	O
,	O
respectively	O
,	O
their	O
370/145	B-Device
and	O
370/135	B-Device
systems	O
.	O
</s>
<s>
The	O
148	O
had	O
four	O
times	O
the	O
reloadable	O
control	B-General_Concept
storage	I-General_Concept
of	O
the	O
145	O
,	O
enabling	O
or	O
enhancing	O
features	O
such	O
as	O
:	O
</s>
<s>
APL	B-Language
Assista	O
Microcode-based	O
feature	O
that	O
allowe	O
for	O
faster	O
execution	O
than	O
a	O
software-only	O
approach	O
.	O
</s>
<s>
Extended	O
control	O
program	O
support''	O
-	O
going	O
beyond	O
the	O
language-specific	O
APL	B-Language
Assist	O
,	O
this	O
had	O
wider	O
scope	O
,	O
reducing	O
CPU	O
cycles	O
needed	O
to	O
run	O
the	O
operating	O
system	O
.	O
</s>
<s>
IBM	O
could	O
upgrade	O
a	O
370/145	B-Device
that	O
had	O
been	O
field-upgraded	O
to	O
a	O
145-2	O
,	O
resulting	O
in	O
a	O
145-3	O
.	O
</s>
