<s>
lftp	B-Protocol
is	O
a	O
command-line	B-Application
program	I-Application
client	B-Protocol
for	O
several	O
file	B-Protocol
transfer	I-Protocol
protocols	I-Protocol
.	O
</s>
<s>
lftp	B-Protocol
is	O
designed	O
for	O
Unix	B-Application
and	O
Unix-like	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
.	O
</s>
<s>
It	O
was	O
developed	O
by	O
Alexander	O
Lukyanov	O
,	O
and	O
is	O
distributed	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
.	O
</s>
<s>
lftp	B-Protocol
can	O
transfer	O
files	O
via	O
FTP	B-Protocol
,	O
FTPS	B-Protocol
,	O
HTTP	B-Protocol
,	O
HTTPS	B-Protocol
,	O
FISH	B-Protocol
,	O
SFTP	B-Protocol
,	O
BitTorrent	B-Protocol
,	O
and	O
FTP	B-Protocol
over	O
HTTP	B-Protocol
proxy	O
.	O
</s>
<s>
It	O
also	O
supports	O
the	O
File	B-Protocol
eXchange	I-Protocol
Protocol	I-Protocol
(	O
FXP	O
)	O
,	O
which	O
allows	O
the	O
client	B-Protocol
to	O
transfer	O
files	O
from	O
one	O
remote	O
FTP	B-Protocol
server	I-Protocol
to	O
another	O
.	O
</s>
<s>
Among	O
lftp	B-Protocol
's	O
features	O
are	O
transfer	O
queues	O
,	O
segmented	O
file	B-Protocol
transfer	I-Protocol
,	O
resuming	O
partial	O
downloads	O
,	O
bandwidth	O
throttling	O
,	O
and	O
recursive	O
copying	O
of	O
file	B-Application
directories	I-Application
.	O
</s>
<s>
The	O
client	B-Protocol
can	O
be	O
used	O
interactively	O
or	O
automated	O
with	O
scripts	O
.	O
</s>
<s>
It	O
has	O
Unix	O
shell-like	O
job	B-Operating_System
control	I-Operating_System
,	O
and	O
a	O
facility	O
for	O
scheduling	O
file	B-Protocol
transfers	I-Protocol
for	O
execution	O
at	O
a	O
later	O
time	O
.	O
</s>
<s>
lftp	B-Protocol
was	O
initially	O
developed	O
as	O
part	O
of	O
the	O
ftpclass	O
package	O
.	O
</s>
<s>
Subsequently	O
it	O
grew	O
and	O
became	O
a	O
more	O
capable	O
program	O
(	O
e.g.	O
,	O
mirroring	O
capability	O
was	O
added	O
)	O
,	O
and	O
was	O
renamed	O
to	O
lftp	B-Protocol
in	O
February	O
1997	O
.	O
</s>
<s>
The	O
initial	O
goals	O
of	O
development	O
were	O
robustness	O
,	O
automatic	O
resuming	O
of	O
transfers	O
,	O
and	O
increasing	O
transfer	O
speed	O
by	O
transferring	O
parts	O
of	O
a	O
file	O
in	O
parallel	O
using	O
several	O
connections	O
as	O
well	O
as	O
by	O
protocol	B-Protocol
pipelining	I-Protocol
.	O
</s>
<s>
Version	O
2.0	O
introduced	O
HTTP	B-Protocol
and	O
IPv6	B-Protocol
support	O
in	O
1999	O
,	O
more	O
protocols	O
were	O
added	O
later	O
.	O
</s>
