<s>
The	O
ZX	B-Operating_System
Spectrum	I-Operating_System
's	O
software	O
library	O
was	O
very	O
diverse	O
.	O
</s>
<s>
While	O
the	O
majority	O
of	O
the	O
software	O
produced	O
for	O
the	O
system	O
was	O
video	O
games	O
,	O
others	O
included	O
programming	O
language	O
implementations	O
,	O
Sinclair	B-Language
BASIC	I-Language
extensions	O
,	O
databases	O
,	O
word	O
processors	O
,	O
spread	B-Application
sheets	I-Application
,	O
drawing	O
and	O
painting	O
tools	O
,	O
and	O
3D	O
modelling	O
tools	O
.	O
</s>
<s>
Between	O
October	O
1991	O
and	O
February	O
1992	O
Your	O
Sinclair	O
published	O
a	O
list	O
of	O
what	O
they	O
considered	O
to	O
be	O
the	O
top	O
100	O
games	O
for	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
.	O
</s>
<s>
Between	O
August	O
and	O
December	O
1991	O
CRASH	O
published	O
their	O
list	O
of	O
the	O
top	O
100	O
ZX	B-Device
Spectrum	I-Device
games	I-Device
,	O
including	O
in	O
the	O
top	O
10	O
:	O
</s>
<s>
Chase	B-Application
H.Q.	I-Application
</s>
<s>
Techradar	O
published	O
their	O
list	O
of	O
the	O
best	O
30	O
ZX	B-Device
Spectrum	I-Device
games	I-Device
in	O
2012	O
,	O
underlining	O
which	O
games	O
stood	O
the	O
test	O
of	O
time	O
.	O
</s>
<s>
Chase	B-Application
H.Q.	I-Application
</s>
<s>
A	O
number	O
of	O
current	O
leading	O
games	O
developers	O
and	O
development	O
companies	O
began	O
their	O
careers	O
on	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
.	O
</s>
<s>
David	O
Perry	O
of	O
Shiny	O
Entertainment	O
wrote	O
Three	B-Application
Weeks	I-Application
in	I-Application
Paradise	I-Application
and	O
Dan	O
Dare	O
.	O
</s>
<s>
Tim	O
and	O
his	O
brother	O
Chris	O
Stamper	O
,	O
along	O
with	O
Tim	O
's	O
girlfriend	O
(	O
later	O
wife	O
)	O
Carole	O
Ward	O
and	O
John	O
Lathbury	O
,	O
published	O
Jetpac	B-Application
,	O
Atic	B-Application
Atac	I-Application
,	O
Sabre	B-Application
Wulf	I-Application
and	O
Knightlore	B-Application
:	O
and	O
many	O
others	O
,	O
as	O
Ultimate	O
Play	O
the	O
Game	O
,	O
now	O
known	O
as	O
Rare	O
,	O
maker	O
of	O
many	O
famous	O
titles	O
for	O
Nintendo	O
and	O
Xbox	B-Protocol
game	O
consoles	O
.	O
</s>
<s>
Jonathan	O
"	O
Joffa	O
"	O
Smith	O
wrote	O
Cobra	B-Application
,	O
Hysteria	O
,	O
Firefly	O
and	O
a	O
conversion	O
from	O
the	O
Green	B-Application
Beret	I-Application
arcade	O
among	O
other	O
games	O
which	O
prove	O
that	O
smooth	O
scrolling	O
was	O
never	O
a	O
problem	O
on	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
,	O
as	O
long	O
as	O
the	O
developer	O
had	O
the	O
necessary	O
technical	O
knowledge	O
.	O
</s>
<s>
Matthew	O
Smith	O
wrote	O
the	O
seminal	O
Spectrum	O
titles	O
Manic	B-Application
Miner	I-Application
and	O
Jet	B-Application
Set	I-Application
Willy	I-Application
,	O
proving	O
that	O
it	O
was	O
possible	O
to	O
have	O
continual	O
music	O
during	O
game	O
play	O
on	O
a	O
Spectrum	O
;	O
</s>
<s>
Nigel	O
Alderton	O
was	O
the	O
16	O
year	O
old	O
author	O
of	O
Chuckie	B-Application
Egg	I-Application
,	O
published	O
by	O
A'n'F	O
Software	O
on	O
the	O
Spectrum	O
and	O
BBC	B-Device
Micro	I-Device
;	O
</s>
<s>
The	O
first	O
author	O
of	O
an	O
isometric	O
3D	O
game	O
:	O
Ant	B-Application
Attack	I-Application
,	O
published	O
by	O
Quicksilva	O
:	O
was	O
Sandy	O
White	O
;	O
</s>
<s>
Julian	O
Gollop	O
wrote	O
Rebelstar	B-Application
and	O
Laser	B-Application
Squad	I-Application
;	O
</s>
<s>
Jon	O
Ritman	O
was	O
the	O
author	O
of	O
Match	B-Application
Day	I-Application
and	O
Head	B-Application
Over	I-Application
Heels	I-Application
;	O
</s>
<s>
The	O
Oliver	O
Twins	O
wrote	O
the	O
Dizzy	B-Application
series	O
of	O
games	O
;	O
</s>
<s>
David	O
and	O
Helen	O
Reidy	O
wrote	O
Skool	B-Application
Daze	I-Application
and	O
Back	B-Application
to	I-Application
Skool	I-Application
for	O
Microsphere	O
;	O
</s>
<s>
Christian	O
Penfold	O
and	O
Mel	O
Croucher	O
,	O
of	O
Automata	O
,	O
authors	O
of	O
Pimania	B-Application
,	O
My	B-Application
Name	I-Application
Is	I-Application
Uncle	I-Application
Groucho	I-Application
,	I-Application
You	I-Application
Win	I-Application
A	I-Application
Fat	I-Application
Cigar	I-Application
and	O
Deus	B-Application
Ex	I-Application
Machina	I-Application
;	O
</s>
<s>
Paul	O
Owens	O
and	O
Christian	O
Urquhart	O
,	O
developers	O
of	O
Daley	B-Application
Thompson	I-Application
's	I-Application
Decathlon	I-Application
for	O
Ocean	O
Software	O
;	O
</s>
<s>
Philip	O
Mitchell	O
and	O
Veronika	O
Megler	O
of	O
Beam	O
Software	O
,	O
who	O
wrote	O
The	B-Application
Hobbit	I-Application
published	O
by	O
Melbourne	O
House	O
;	O
</s>
<s>
Platinum	O
Productions	O
(	O
David	O
J	O
Anderson	O
and	O
Ian	O
Morrison	O
)	O
,	O
authors	O
of	O
the	O
conversions	O
of	O
Lode	B-Application
Runner	I-Application
,	O
Beach	O
Head	O
and	O
Rambo	O
;	O
</s>
<s>
Costa	O
Panayi	O
,	O
who	O
wrote	O
Android	O
,	O
Android	B-Application
Two	I-Application
,	O
Highway	B-Application
Encounter	I-Application
,	O
Cyclone	B-Application
and	O
Tornado	B-Application
Low	I-Application
Level	I-Application
for	O
Vortex	O
Software	O
;	O
</s>
<s>
William	O
Tang	O
wrote	O
the	O
Horace	B-Application
series	I-Application
of	O
games	O
(	O
Hungry	O
Horace	B-Application
,	O
Horace	B-Application
Goes	O
Skiing	O
and	O
Horace	B-Application
and	O
the	O
Spiders	O
)	O
for	O
Beam	O
Software	O
,	O
published	O
by	O
Sinclair	O
Research	O
and	O
Melbourne	O
House	O
.	O
</s>
<s>
The	O
demo	O
scene	O
on	O
the	O
Spectrum	O
can	O
probably	O
be	O
traced	O
back	O
to	O
Castor	B-Device
Cracking	I-Device
Group	I-Device
,	O
The	B-Device
Lords	I-Device
and	O
a	O
few	O
other	O
groups	O
and	O
individuals	O
back	O
in	O
1986	O
.	O
</s>
<s>
The	O
ZX	B-Operating_System
Spectrum	I-Operating_System
demo	O
scene	O
was	O
slow	O
to	O
start	O
,	O
but	O
it	O
started	O
to	O
rise	O
in	O
the	O
late	O
1980s	O
,	O
most	O
noticeably	O
in	O
Eastern	O
Europe	O
and	O
southern	O
Europe	O
.	O
</s>
<s>
Although	O
there	O
are	O
many	O
demos	O
made	O
for	O
the	O
48K	O
Spectrums	O
,	O
most	O
current	O
Spectrum	O
demos	O
require	O
the	O
additional	O
features	O
found	O
in	O
the	O
Spectrum	O
128K	O
,	O
that	O
is	O
,	O
128	O
KiB	O
of	O
RAM	O
and	O
the	O
AY-3-8912	B-Device
sound	O
chip	O
.	O
</s>
<s>
Also	O
,	O
many	O
demos	O
have	O
been	O
designed	O
to	O
run	O
from	O
a	O
floppy	B-Device
disk	I-Device
rather	O
than	O
a	O
cassette	B-Device
tape	I-Device
.	O
</s>
<s>
For	O
example	O
,	O
on	O
most	O
Russian	O
demoscene	O
events	O
,	O
the	O
standard	O
"	O
compo	O
Spectrum	O
"	O
is	O
the	O
Pentagon	B-Device
128	I-Device
with	O
a	O
floppy	B-Device
disk	I-Device
drive	I-Device
.	O
</s>
<s>
Since	O
there	O
are	O
considerable	O
technical	O
differences	O
between	O
the	O
Pentagon	B-Device
and	O
the	O
original	O
Spectrum	O
,	O
particularly	O
in	O
the	O
video	O
timing	O
,	O
there	O
are	O
also	O
many	O
demos	O
that	O
require	O
a	O
Pentagon	B-Device
to	O
run	O
properly	O
.	O
</s>
<s>
Piotr	O
Marecki	O
,	O
cultural	O
studies	O
and	O
digital	O
culture	O
scholar	O
at	O
Jagiellonian	O
University	O
,	O
argues	O
that	O
this	O
makes	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
demoscene	O
unique	O
.	O
</s>
<s>
Nowadays	O
clones	O
and	O
interfaces	O
are	O
being	O
created	O
that	O
can	O
run	O
demos	O
for	O
various	O
ZX	B-Operating_System
Spectrum	I-Operating_System
hardware	O
accessories	O
and	O
clones	O
,	O
such	O
as	O
the	O
ZX-UNO	O
,	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
Next	O
and	O
the	O
MB03+	O
Ultimate	O
interface	O
.	O
</s>
<s>
The	O
eLeMeNt	O
ZX	O
computer	O
is	O
specially	O
designed	O
to	O
support	O
enhancements	O
used	O
by	O
demomakers	O
,	O
that	O
includes	O
3	O
memory	O
models	O
of	O
the	O
Pentagon	B-Device
and	O
the	O
ability	O
of	O
switching	O
,	O
on	O
fly	O
,	O
between	O
various	O
zx-clones	O
timings	O
,	O
CPU	O
speeds	O
and	O
gigascreen	O
graphics	O
.	O
</s>
<s>
Many	O
later	O
demos	O
feature	O
so-called	O
'	O
multicolor	O
 '	O
effects	O
(	O
changing	O
the	O
color	O
attributes	O
of	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
's	O
display	O
configuration	O
of	O
768	O
character	O
blocks	O
)	O
,	O
which	O
have	O
to	O
be	O
fixed	O
to	O
a	O
specific	O
ZX	B-Operating_System
Spectrum	I-Operating_System
model	O
.	O
</s>
<s>
In	O
the	O
former	O
Soviet	O
Union	O
and	O
Eastern/Central	O
Europe	O
,	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
often	O
has	O
a	O
cult	O
status	O
similar	O
to	O
the	O
Commodore	O
64	O
in	O
the	O
Western	O
Europe	O
:	O
it	O
was	O
the	O
most	O
popular	O
8-bit	O
homecomputer	O
and	O
also	O
the	O
first	O
computer	O
for	O
many	O
computer	O
and	O
demoscene	O
enthusiasts	O
.	O
</s>
<s>
Therefore	O
,	O
whereas	O
many	O
major	O
Western	O
European	O
demo	O
parties	O
organise	O
demo	O
,	O
music	O
and	O
graphics	O
competitions	O
for	O
the	O
Commodore	O
64	O
,	O
the	O
parties	O
in	O
the	O
east	O
often	O
have	O
the	O
corresponding	O
ZX	B-Operating_System
Spectrum	I-Operating_System
competitions	O
instead	O
.	O
</s>
<s>
ZX	B-Operating_System
Spectrum	I-Operating_System
demos	O
have	O
been	O
shown	O
at	O
multi-platform	O
demoparties	O
such	O
as	O
Assembly	O
,	O
and	O
there	O
used	O
to	O
be	O
various	O
Spectrum-only	O
parties	O
,	O
such	O
as	O
Funtop	O
in	O
Moscow	O
.	O
</s>
<s>
The	O
largest	O
party	O
today	O
that	O
regularly	O
features	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
is	O
Chaos	O
Constructions	O
in	O
Saint	O
Petersburg	O
.	O
</s>
<s>
Z80	B-General_Concept
assemblers/disassemblers	O
:	O
</s>
<s>
Sinclair	B-Language
BASIC	I-Language
extensions	O
and	O
compilers	O
:	O
</s>
<s>
Because	O
most	O
British	O
home	O
computer	O
owners	O
used	O
tape	O
instead	O
of	O
disk	O
storage	O
into	O
the	O
mid-1980s	O
,	O
most	O
ZX	B-Operating_System
Spectrum	I-Operating_System
software	I-Operating_System
was	O
originally	O
distributed	O
on	O
audio	B-Device
cassette	I-Device
tapes	I-Device
.	O
</s>
<s>
The	O
software	O
is	O
encoded	O
on	O
tape	O
as	O
a	O
sequence	O
of	O
pulses	B-Algorithm
that	O
sound	O
similar	O
to	O
the	O
noises	O
made	O
by	O
a	O
modem	B-Application
.	O
</s>
<s>
Since	O
the	O
Spectrum	O
has	O
only	O
a	O
rudimentary	O
tape	O
interface	O
,	O
data	O
is	O
recorded	O
using	O
an	O
unusually	O
simple	O
and	O
very	O
reliable	O
modulation	O
:	O
similar	O
to	O
pulse-width	B-Algorithm
modulation	I-Algorithm
but	O
without	O
a	O
constant	O
clock	O
rate	O
.	O
</s>
<s>
Pulses	B-Algorithm
of	O
different	O
widths	O
(	O
durations	O
)	O
represent	O
0s	O
and	O
1s	O
.	O
</s>
<s>
Higher	O
speeds	O
are	O
possible	O
using	O
custom	O
machine	B-Language
code	I-Language
loaders	O
instead	O
of	O
the	O
ROM	B-Device
routines	O
.	O
</s>
<s>
Headers	O
have	O
a	O
short	O
size	O
of	O
19	O
bytes	O
(	O
1	O
zero-value	O
flag	O
byte	O
,	O
17	O
header	O
information	O
bytes	O
,	O
and	O
1	O
checksum	B-Algorithm
byte	O
)	O
,	O
where	O
the	O
header	O
information	O
consists	O
of	O
a	O
type	O
byte	O
,	O
a	O
10-byte	O
filename	O
,	O
a	O
word	O
data	O
block	O
length	O
,	O
and	O
two	O
word	O
parameters	O
.	O
</s>
<s>
Depending	O
on	O
the	O
type	O
byte	O
,	O
the	O
loader	O
presents	O
one	O
of	O
the	O
follow	O
messages	O
:	O
Program	O
:	O
<filename> for programs written in BASIC; Bytes: <filename>	O
for	O
machine	B-Language
code	I-Language
,	O
screen	O
dumps	O
,	O
etc	O
.	O
</s>
<s>
Striped	O
border	O
effects	O
,	O
as	O
used	O
in	O
the	O
standard	O
loader	O
or	O
more	O
complex	O
ones	O
(	O
see	O
below	O
)	O
can	O
also	O
be	O
found	O
on	O
games	O
written	O
for	O
other	O
8-bit	O
computers	O
,	O
such	O
as	O
the	O
Commodore	O
C64	O
,	O
and	O
the	O
Amstrad	O
CPC	O
464/664/6128	O
:	O
which	O
,	O
as	O
it	O
used	O
the	O
same	O
Z80	B-General_Concept
CPU	O
,	O
often	O
received	O
ports	O
of	O
loading	O
routines	O
originally	O
for	O
the	O
Spectrum	O
.	O
</s>
<s>
The	O
Spectrum	O
was	O
intended	O
to	O
work	O
with	O
almost	O
any	O
cassette	B-Device
tape	I-Device
player	O
,	O
and	O
despite	O
differences	O
in	O
audio	O
reproduction	O
fidelity	O
,	O
the	O
software	O
loading	O
process	O
was	O
designed	O
to	O
be	O
reliable	O
;	O
nevertheless	O
it	O
was	O
still	O
possible	O
for	O
tapes	O
to	O
fail	O
loading	O
with	O
the	O
message	O
R	O
Tape	O
loading	O
error	O
,	O
0:1	O
.	O
</s>
<s>
The	O
ZX	B-Operating_System
Spectrum	I-Operating_System
Plus	O
2	O
and	O
2A	O
models	O
are	O
fashioned	O
after	O
an	O
Amstrad	B-Device
CPC	I-Device
464	I-Device
and	O
feature	O
a	O
built-in	O
tape	O
"	O
datacorder	O
"	O
.	O
</s>
<s>
Complex	O
loaders	O
with	O
unusual	O
speeds	O
or	O
encoding	O
were	O
the	O
basis	O
of	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
copy	B-Application
protection	I-Application
schemes	O
,	O
although	O
other	O
methods	O
were	O
used	O
including	O
asking	O
for	O
a	O
particular	O
word	O
from	O
the	O
documentation	O
included	O
with	O
the	O
game	O
—	O
often	O
a	O
novella	O
—	O
or	O
the	O
notorious	O
Lenslok	B-Device
system	O
.	O
</s>
<s>
This	O
relied	O
rather	O
too	O
much	O
on	O
everyone	O
using	O
the	O
same	O
size	O
television	O
,	O
and	O
Lenslok	B-Device
became	O
a	O
running	O
joke	O
with	O
Spectrum	O
users	O
.	O
</s>
<s>
Most	O
were	O
copyright	O
infringement	O
oriented	O
,	O
and	O
their	O
function	O
was	O
only	O
tape	O
duplication	O
,	O
but	O
when	O
Sinclair	O
Research	O
launched	O
the	O
ZX	B-Device
Microdrive	I-Device
,	O
copiers	O
were	O
developed	O
to	O
copy	O
programs	O
from	O
audio	O
tape	O
to	O
microdrive	O
tapes	O
,	O
and	O
later	O
on	O
diskettes	B-Device
.	O
</s>
<s>
Special	O
hardware	O
,	O
like	O
Romantic	O
Robot	O
's	O
Multiface	B-Device
which	O
was	O
able	O
to	O
dump	O
a	O
copy	O
of	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
RAM	O
to	O
disk/tape	O
at	O
the	O
press	O
of	O
a	O
button	O
,	O
was	O
developed	O
,	O
entirely	O
circumventing	O
the	O
copy	B-Application
protection	I-Application
systems	O
.	O
</s>
<s>
The	O
ZX	B-Device
Microdrive	I-Device
system	O
was	O
released	O
in	O
July	O
1983	O
.	O
</s>
<s>
While	O
the	O
drives	O
were	O
cheaper	O
than	O
floppy	B-Device
disk	I-Device
drives	I-Device
,	O
the	O
media	O
was	O
very	O
expensive	O
for	O
software	O
publishers	O
to	O
use	O
for	O
mass	O
market	O
releases	O
(	O
by	O
a	O
factor	O
of	O
10	O
,	O
compared	O
to	O
tape	O
duplication	O
)	O
and	O
acquired	O
a	O
reputation	O
for	O
unreliability	O
,	O
with	O
publishers	O
reluctant	O
to	O
QA	O
each	O
and	O
every	O
item	O
shipped	O
.	O
</s>
<s>
The	O
main	O
use	O
became	O
to	O
complement	O
tape	O
releases	O
,	O
usually	O
utilities	O
and	O
niche	O
products	O
like	O
the	O
Tasword	B-Protocol
word	B-General_Concept
processing	I-General_Concept
software	O
and	O
Trans	O
Express	O
.	O
</s>
<s>
Several	O
floppy	B-Device
disk	I-Device
systems	O
were	O
designed	O
for	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
.	O
</s>
<s>
The	O
most	O
popular	O
(	O
excepting	O
Eastern	O
Europe	O
,	O
)	O
were	O
the	O
DISCiPLE	B-Device
and	O
+D	B-Device
systems	O
released	O
by	O
Miles	O
Gordon	O
Technology	O
in	O
1987	O
and	O
1988	O
respectively	O
.	O
</s>
<s>
Despite	O
becoming	O
popular	O
and	O
being	O
reliable	O
(	O
from	O
using	O
standard	O
Shugart	B-Architecture
disk	O
drives	O
)	O
,	O
most	O
releases	O
were	O
utility	O
software	O
.	O
</s>
<s>
However	O
,	O
both	O
systems	O
had	O
the	O
ability	O
to	O
store	O
memory	O
images	O
onto	O
disk	O
,	O
snapshots	O
,	O
which	O
later	O
on	O
could	O
be	O
loaded	O
back	O
into	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
and	O
execution	O
would	O
commence	O
from	O
the	O
point	O
where	O
they	O
were	O
"	O
snapped	O
"	O
,	O
making	O
them	O
perfect	O
for	O
"	O
backups	O
"	O
.	O
</s>
<s>
The	O
ZX	B-Operating_System
Spectrum	I-Operating_System
+3	O
featured	O
a	O
built-in	O
3	O
"	O
disk	O
drive	O
and	O
enjoyed	O
more	O
success	O
when	O
it	O
came	O
to	O
commercial	O
software	O
releases	O
.	O
</s>
<s>
Most	O
Russian	O
releases	O
since	O
1989	O
are	O
made	O
for	O
the	O
Beta	B-Device
128	I-Device
disc	O
interface	O
,	O
the	O
only	O
system	O
now	O
in	O
use	O
there	O
.	O
</s>
<s>
The	O
prevalent	O
language	O
for	O
distribution	O
was	O
the	O
Spectrum	O
's	O
BASIC	O
dialect	O
Sinclair	B-Language
BASIC	I-Language
.	O
</s>
<s>
The	O
software	O
distributed	O
in	O
this	O
way	O
was	O
in	O
general	O
simpler	O
and	O
slower	O
than	O
its	O
assembly	B-Language
language	I-Language
counterparts	O
,	O
and	O
lacked	O
graphics	O
.	O
</s>
<s>
But	O
soon	O
,	O
magazines	O
were	O
printing	O
long	O
lists	O
of	O
checksummed	O
hexadecimal	O
digits	O
with	O
machine	B-Language
code	I-Language
games	O
or	O
tools	O
.	O
</s>
<s>
Croatia	O
(	O
Radio	O
101	O
)	O
,	O
Serbia	O
(	O
Ventilator	B-Device
202	I-Device
)	O
,	O
Slovenia	O
(	O
Radio	O
Študent	O
)	O
,	O
Poland	O
,	O
Czechoslovakia	O
,	O
Romania	O
,	O
Lebanon	O
or	O
Brazil	O
,	O
where	O
the	O
host	O
would	O
describe	O
a	O
program	O
,	O
instruct	O
the	O
audience	O
to	O
connect	O
a	O
cassette	B-Device
tape	I-Device
recorder	I-Device
to	O
the	O
radio	O
or	O
TV	O
and	O
then	O
broadcast	O
the	O
program	O
over	O
the	O
airwaves	O
in	O
audio	O
format	O
.	O
</s>
<s>
In	O
former	O
Soviet	O
Union	O
,	O
mostly	O
in	O
Russia	O
and	O
Ukraine	O
unauthorised	O
radio	O
operators	O
(	O
so-called	O
radio	O
hooligans	O
)	O
often	O
exchanged	O
software	O
from	O
cassette	B-Device
tapes	I-Device
for	O
Spectrum	O
and	O
other	O
popular	O
computers	O
by	O
broadcasting	O
it	O
.	O
</s>
<s>
These	O
disks	O
were	O
known	O
under	O
various	O
trademarked	O
names	O
including	O
"	O
Floppy	B-Device
ROM	B-Device
"	O
,	O
"	O
Flexisoft	O
"	O
,	O
and	O
"	O
Discoflex	O
"	O
.	O
</s>
<s>
Also	O
in	O
1984	O
,	O
the	O
Thompson	O
Twins	O
released	O
a	B-Application
game	I-Application
on	I-Application
vinyl	I-Application
.	O
</s>
<s>
The	O
Freshies	O
had	O
a	O
brief	O
flirtation	O
with	O
fame	O
and	O
Spectrum	O
games	O
,	O
with	O
Frank	O
Sidebottom	O
making	O
an	O
early	O
appearance	O
in	O
The	B-Application
Biz	I-Application
.	O
</s>
<s>
Aphex	O
Twin	O
included	O
various	O
loading	O
noises	O
on	O
his	O
Richard	O
D	O
.	O
James	O
album	O
in	O
1996	O
,	O
most	O
notably	O
part	O
of	O
the	O
loading	O
screen	O
from	O
Sabre	B-Application
Wulf	I-Application
on	O
Carn	O
Marth	O
.	O
</s>
<s>
This	O
was	O
developed	O
by	O
the	O
band	O
's	O
keyboard	O
player	O
,	O
Dave	O
Greenfield	O
,	O
using	O
the	B-Application
Quill	I-Application
Adventure	I-Application
System	I-Application
.	O
</s>
<s>
The	O
included	O
cassette	B-Device
tape	I-Device
features	O
a	O
ZX	B-Operating_System
Spectrum	I-Operating_System
program	O
that	O
generates	O
random	O
text	O
and	O
colours	O
,	O
whilst	O
playing	O
tones	O
akin	O
to	O
a	O
track	O
included	O
on	O
the	O
cassette	O
.	O
</s>
<s>
There	O
was	O
also	O
a	O
music	O
program	O
for	O
the	O
Spectrum	B-Operating_System
48K	I-Operating_System
which	O
allowed	O
to	O
play	O
two	O
notes	O
at	O
a	O
time	O
,	O
by	O
rapidly	O
switching	O
between	O
the	O
waveforms	O
of	O
the	O
two	O
separate	O
notes	O
,	O
a	O
big	O
improvement	O
over	O
the	O
mono	O
Spectrum	O
sound	O
.	O
</s>
