<s>
Syllabic	B-Device
octal	I-Device
and	O
split	O
octal	O
are	O
two	O
similar	O
notations	O
for	O
8-bit	O
and	O
16-bit	O
octal	O
numbers	O
,	O
respectively	O
,	O
used	O
in	O
some	O
historical	O
contexts	O
.	O
</s>
<s>
Syllabic	B-Device
octal	I-Device
is	O
an	O
8-bit	O
octal	O
number	O
representation	O
that	O
was	O
used	O
by	O
English	O
Electric	O
in	O
conjunction	O
with	O
their	O
KDF9	B-Device
machine	O
in	O
the	O
mid-1960s	O
.	O
</s>
<s>
Although	O
the	O
word	O
'	O
byte	B-Application
 '	O
had	O
been	O
coined	O
by	O
the	O
designers	O
of	O
the	O
IBM	B-Device
7030	I-Device
Stretch	I-Device
for	O
a	O
group	O
of	O
eight	O
bits	O
,	O
it	O
was	O
not	O
yet	O
well	O
known	O
,	O
and	O
English	O
Electric	O
used	O
the	O
word	O
'	O
syllable	B-General_Concept
 '	O
for	O
what	O
is	O
now	O
called	O
a	O
byte	B-Application
.	O
</s>
<s>
Machine	B-Language
code	I-Language
programming	O
used	O
an	O
unusual	O
form	O
of	O
octal	O
,	O
known	O
locally	O
as	O
'	O
bastardized	O
octal	O
 '	O
.	O
</s>
<s>
A	O
more	O
polite	O
colloquial	O
name	O
was	O
'	O
silly	O
octal	O
 '	O
,	O
derived	O
from	O
the	O
official	O
name	O
which	O
was	O
syllabic	B-Device
octal	I-Device
(	O
also	O
known	O
as	O
'	O
slob-octal	O
'	O
or	O
'	O
slob	O
 '	O
notation	O
,	O
)	O
.	O
</s>
<s>
Split	O
octal	O
is	O
an	O
unusual	O
address	O
notation	O
used	O
by	O
Heathkit	O
's	O
PAM8	O
and	O
portions	O
of	O
HDOS	B-Application
for	O
the	O
Heathkit	B-Device
H8	I-Device
in	O
the	O
late	O
1970s	O
(	O
and	O
sometimes	O
up	O
to	O
the	O
present	O
)	O
.	O
</s>
<s>
Most	O
mini	B-Architecture
-	O
and	O
micro-computers	B-Architecture
used	O
either	O
straight	O
octal	O
(	O
377	O
was	O
followed	O
by	O
400	O
)	O
or	O
hexadecimal	O
.	O
</s>
<s>
With	O
the	O
introduction	O
of	O
the	O
optional	O
HA8-6	O
Z80	B-General_Concept
processor	O
replacement	O
for	O
the	O
8080	B-General_Concept
board	O
,	O
the	O
front-panel	O
keyboard	O
got	O
a	O
new	O
set	O
of	O
labels	O
and	O
hexadecimal	O
notation	O
was	O
used	O
instead	O
of	O
octal	O
.	O
</s>
<s>
Through	O
tricky	O
number	O
alignment	O
the	O
HP-16C	B-Device
and	O
other	O
Hewlett-Packard	O
RPN	O
calculators	O
supporting	O
base	O
conversion	O
can	O
implicitly	O
support	O
numbers	O
in	O
split	O
octal	O
as	O
well	O
.	O
</s>
