You can say that Dell Inspiron 510m 1600LT was one of the ancestors of the currently very popular Dell Inspiron series of laptops.
It was a good computing machine for its time but it simply obsolete as of now.
Today smart phones have more computing power than Dell Inspiron 510m 1600LT
But we cannot also discard the fact that it was one of the stepping stones for future of Inspiron series.
It used to have Intel Centrino Intel Pentium M 1.5 GHz processor
Default RAM was 256 MB which could be extended upto 2GB. Ofcourse it was not great but then programs in those days also did not need alot of RAM.
There was also a DVD-ROM - removable which used to come very handy in those days.
Not it is all about usb slots.
Its screen resolution was 1024 x 768(XGA) which was decent then
Its design was also plain and simple and it used to be heavy at