Most estate agent companies will have a favored software which all their employers will use. The software must be able to list properties, availability, interest and book viewings. The software must update regularly to ensure clients are aware of availability and price.
In April 2013, the furthest star observed spectroscopically was 55 thousand light years away, with the cute name of SDSS J122952.66+112227.8 [SDSS = Sloan Digital Sky Survey]. The farthest known object is the galaxy named z8_GND_5296, at a distance of 13.1 billion light years.