<s>
John	O
Gruber	O
(	O
born	O
1973	O
)	O
is	O
a	O
technology	O
blogger	B-Application
,	O
UI	B-Application
designer	I-Application
,	O
and	O
one	O
of	O
the	O
inventors	O
of	O
the	O
Markdown	O
markup	O
language	O
.	O
</s>
<s>
He	O
received	O
his	O
Bachelor	O
of	O
Science	O
in	O
computer	B-General_Concept
science	I-General_Concept
from	O
Drexel	O
University	O
,	O
then	O
worked	O
for	O
Bare	O
Bones	O
Software	O
(	O
2000	O
–	O
02	O
)	O
and	O
Joyent	B-General_Concept
(	O
2005	O
–	O
06	O
)	O
.	O
</s>
<s>
In	O
2004	O
,	O
Aaron	O
Swartz	O
and	O
Gruber	O
worked	O
together	O
to	O
create	O
the	O
Markdown	O
language	O
,	O
with	O
the	O
goal	O
of	O
enabling	O
people	O
"	O
to	O
write	O
using	O
an	O
easy-to-read	O
and	O
easy-to-write	O
plain	O
text	O
format	O
,	O
optionally	O
convert	O
it	O
to	O
structurally	O
valid	O
XHTML	B-Language
(	O
or	O
HTML	B-Language
)	O
"	O
.	O
</s>
<s>
Since	O
2002	O
,	O
Gruber	O
has	O
written	O
and	O
produced	O
Daring	B-Application
Fireball	I-Application
,	O
a	O
technology-focused	O
blog	O
.	O
</s>
<s>
He	O
has	O
described	O
his	O
Daring	B-Application
Fireball	I-Application
writing	O
as	O
a	O
"	O
Mac	B-Device
column	O
in	O
the	O
form	O
of	O
a	O
weblog.	O
"	O
</s>
<s>
The	O
site	O
is	O
written	O
in	O
the	O
form	O
of	O
a	O
tumblelog	B-Application
called	O
The	O
Linked	O
List	O
,	O
a	O
linklog	B-General_Concept
with	O
brief	O
commentary	O
,	O
in	O
between	O
occasional	O
longform	O
articles	O
that	O
discuss	O
Apple	O
products	O
and	O
issues	O
in	O
related	O
consumer	O
technology	O
.	O
</s>
<s>
Gruber	O
often	O
writes	O
about	O
user	B-Application
interfaces	I-Application
,	O
software	O
development	O
,	O
Mac	B-Device
applications	O
,	O
and	O
Apple	O
's	O
media	O
coverage	O
.	O
</s>
<s>
The	O
blog	O
's	O
name	O
comes	O
from	O
Gruber	O
's	O
childhood	O
aspiration	O
for	O
a	O
career	O
as	O
a	O
human	B-Application
cannonball	I-Application
stuntman	B-Application
act	O
named	O
the	O
Daring	B-Application
Fireball	I-Application
.	O
</s>
<s>
Daring	B-Application
Fireball	I-Application
logo	O
T-shirts	O
are	O
also	O
sold	O
,	O
which	O
include	O
a	O
membership	O
.	O
</s>
<s>
For	O
most	O
of	O
the	O
time	O
when	O
Daring	B-Application
Fireball	I-Application
was	O
a	O
part-time	O
project	O
,	O
Gruber	O
worked	O
as	O
an	O
independent	O
web	O
designer	O
;	O
between	O
late	O
2005	O
and	O
April	O
2006	O
,	O
Gruber	O
's	O
worked	O
at	O
Joyent	B-General_Concept
where	O
he	O
helped	O
with	O
the	O
TextDrive	O
acquisition	O
.	O
</s>
<s>
In	O
April	O
2006	O
,	O
Daring	B-Application
Fireball	I-Application
became	O
Gruber	O
's	O
full-time	O
job	O
,	O
funded	O
by	O
advertisement	O
revenue	O
,	O
membership	O
fees	O
,	O
T-shirt	O
sales	O
,	O
and	O
donations	O
from	O
software	O
projects	O
also	O
hosted	O
on	O
the	O
site	O
,	O
such	O
as	O
Markdown	O
.	O
</s>
<s>
From	O
2006	O
to	O
2017	O
,	O
the	O
site	O
displayed	O
advertisements	O
from	O
The	O
Deck	O
,	O
an	O
advertising	O
network	O
serving	O
sites	O
like	O
A	O
List	O
Apart	O
and	O
37signals	O
in	O
addition	O
to	O
Daring	B-Application
Fireball	I-Application
.	O
</s>
<s>
In	O
addition	O
to	O
this	O
,	O
many	O
Amazon.com	B-Application
links	O
once	O
carried	O
Daring	B-Application
Fireball	I-Application
's	O
referral	O
ID	O
,	O
and	O
the	O
site	O
's	O
preferences	O
once	O
included	O
a	O
choice	O
of	O
local	O
Amazon	B-Application
store	I-Application
.	O
</s>
<s>
Amazon	B-Application
removed	O
Daring	B-Application
Fireball	I-Application
from	O
their	O
affiliate	O
program	O
for	O
a	O
violation	O
of	O
their	O
terms	O
of	O
service	O
.	O
</s>
<s>
The	O
Talk	O
Show	O
is	O
a	O
technology	O
podcast	B-Operating_System
started	O
by	O
Gruber	O
intended	O
as	O
a	O
"	O
director	O
's	O
commentary	O
"	O
to	O
Daring	B-Application
Fireball	I-Application
.	O
</s>
<s>
In	O
June	O
2007	O
,	O
Gruber	O
and	O
Dan	O
Benjamin	O
began	O
co-hosting	O
an	O
independent	O
podcast	B-Operating_System
featuring	O
conversations	O
and	O
commentary	O
on	O
trends	O
,	O
mainly	O
focusing	O
on	O
technology	O
at	O
thetalkshow.net	O
.	O
</s>
<s>
The	O
show	O
ran	O
for	O
80	O
episodes	O
and	O
in	O
May	O
2014	O
,	O
The	O
Talk	O
Show	O
parted	O
ways	O
with	O
Mule	O
Radio	O
and	O
became	O
part	O
of	O
Daring	B-Application
Fireball	I-Application
.	O
</s>
<s>
Some	O
recurring	O
guests	O
include	O
John	O
Moltz	O
,	O
Marco	O
Arment	O
,	O
Merlin	O
Mann	O
,	O
Craig	O
Hockenberry	O
,	O
John	O
Siracusa	O
,	O
Rene	O
Ritchie	O
,	O
Guy	O
English	O
,	O
MG	O
Siegler	O
,	O
Ben	O
Thompson	O
,	O
Joanna	O
Stern	O
,	O
Brent	B-Application
Simmons	I-Application
,	O
Om	O
Malik	O
,	O
Jason	O
Snell	O
,	O
Christa	O
Mrgan	O
,	O
Dave	O
Wiskus	O
,	O
Matthew	O
Panzarino	O
,	O
and	O
Serenity	O
Caldwell	O
.	O
</s>
<s>
In	O
early	O
2013	O
,	O
Gruber	O
,	O
Brent	B-Application
Simmons	I-Application
,	O
and	O
Dave	O
Wiskus	O
founded	O
software	O
development	O
firm	O
Q	O
Branch	O
to	O
develop	O
the	O
Vesper	O
notes	O
app	O
for	O
iOS	B-Application
.	O
</s>
<s>
In	O
March	O
2020	O
,	O
Gruber	O
started	O
a	O
new	O
podcast	B-Operating_System
with	O
friend	O
and	O
colleague	O
Ben	O
Thompson	O
called	O
Dithering	O
.	O
</s>
