<s>
Back	B-Application
in	I-Application
Time	I-Application
is	O
an	O
education	O
book	O
app	O
for	O
iOS	B-Application
about	O
the	O
history	O
of	O
the	O
universe	O
,	O
earth	O
,	O
life	O
and	O
mankind	O
that	O
uses	O
a	O
time	O
analogy	O
to	O
explain	O
different	O
timescales	O
.	O
</s>
<s>
The	O
app	O
was	O
featured	O
worldwide	O
in	O
the	O
App	B-Application
Store	I-Application
and	O
rapidly	O
became	O
a	O
success	O
,	O
reaching	O
the	O
top	O
sales	O
of	O
iPad	O
book	O
apps	O
in	O
38	O
countries	O
.	O
</s>
<s>
Back	B-Application
in	I-Application
Time	I-Application
was	O
distinguished	O
by	O
The	O
New	O
York	O
Times	O
and	O
selected	O
for	O
the	O
top	O
10	O
apps	O
of	O
the	O
year	O
.	O
</s>
<s>
Back	B-Application
in	I-Application
Time	I-Application
is	O
a	O
cross	O
between	O
a	O
history	O
textbook	O
and	O
a	O
multimedia	O
encyclopedia	O
.	O
</s>
<s>
Navigation	O
is	O
possible	O
by	O
browsing	O
several	O
timelines	O
or	O
by	O
rewinding	O
the	O
pointers	O
of	O
a	O
clock	O
to	O
go	O
back	B-Application
in	I-Application
time	I-Application
.	O
</s>
<s>
Back	B-Application
in	I-Application
Time	I-Application
presents	O
the	O
most	O
relevant	O
events	O
in	O
history	O
using	O
a	O
24-hour	O
clock	O
as	O
a	O
time	O
analogy	O
.	O
</s>
<s>
This	O
analogy	O
scales	O
the	O
entire	O
age	O
of	O
the	O
universe	O
(	O
13.7	O
billion	O
years	O
)	O
into	O
a	O
single	O
day	O
(	O
24	O
hours	O
)	O
so	O
that	O
the	O
beginning	O
of	O
the	O
universe	O
(	O
Big	B-Application
Bang	I-Application
)	O
started	O
at	O
0:00h	O
and	O
at	O
present	O
time	O
the	O
imaginary	O
clock	O
reads	O
24:00h	O
.	O
</s>
<s>
Back	B-Application
in	I-Application
Time	I-Application
uses	O
this	O
analogy	O
as	O
a	O
method	O
to	O
visualize	O
and	O
compare	O
key	O
events	O
in	O
the	O
history	O
of	O
the	O
universe	O
,	O
of	O
earth	O
,	O
life	O
,	O
and	O
human	O
history	O
.	O
</s>
<s>
Back	B-Application
in	I-Application
Time	I-Application
was	O
developed	O
by	O
the	O
Portuguese	O
software	O
company	O
Landka	O
over	O
a	O
period	O
of	O
10	O
months	O
.	O
</s>
<s>
The	O
iPad	O
version	O
was	O
released	O
on	O
the	O
App	B-Application
Store	I-Application
on	O
September	O
22	O
,	O
2011	O
.	O
</s>
<s>
Subsequent	O
upgrades	O
included	O
additional	O
chapters	O
,	O
translation	O
into	O
two	O
more	O
languages	O
(	O
Chinese	O
and	O
Japanese	O
)	O
and	O
support	O
for	O
retina	B-Operating_System
display	I-Operating_System
.	O
</s>
<s>
In	O
June	O
2013	O
,	O
a	O
version	O
of	O
the	O
app	O
for	O
Microsoft	B-Application
Windows	I-Application
was	O
released	O
as	O
a	O
result	O
of	O
a	O
collaboration	O
between	O
the	O
developers	O
and	O
Intel	O
with	O
the	O
purpose	O
of	O
showcase	O
the	O
capabilities	O
of	O
Windows	B-Application
8	I-Application
.	O
</s>
<s>
Upon	O
release	O
,	O
Back	B-Application
in	I-Application
Time	I-Application
was	O
featured	O
in	O
the	O
App	B-Application
Store	I-Application
worldwide	O
and	O
rapidly	O
became	O
a	O
success	O
,	O
reaching	O
the	O
top	O
sales	O
of	O
iPad	O
book	O
apps	O
in	O
38	O
countries	O
.	O
</s>
<s>
The	O
app	O
received	O
generally	O
positive	O
reviews	O
from	O
the	O
users	O
(	O
4.8/5.0	O
rating	O
score	O
on	O
the	O
App	B-Application
Store	I-Application
)	O
and	O
press	O
.	O
</s>
<s>
Back	B-Application
in	I-Application
Time	I-Application
was	O
featured	O
by	O
The	O
New	O
York	O
Times	O
for	O
the	O
top	O
10	O
apps	O
of	O
the	O
year	O
.	O
</s>
<s>
In	O
2012	O
,	O
Back	B-Application
in	I-Application
Time	I-Application
won	O
a	O
World	O
Summit	O
Award	O
(	O
UN	O
based	O
initiative	O
)	O
for	O
Learning	O
and	O
Education	O
.	O
</s>
