Backhoe loader drive system into their backhoe loaders, allowing these models to go over almost any terrain with little difficulty. Since the backhoe was invented, several companies such as Caterpillar and John Deere have changed the backhoe's back arm to be slightly curved like that of an excavator, which can allow more maneuverability. Backhoe loaders are very common and can be used for a wide variety of tasks: construction, small demolitions, light transportation of building materials, powering building equipment, digging holes/excavation, landscaping, breaking asphalt, and paving roads. Often, the backhoe bucket can also be replaced with powered attachments such as a breaker,
Back-to-back house floor, while later houses were two-up two-down. Every house shared a rear wall, whether with a house directly behind or with an industrial building. Given that the house usually shared three of its four walls with neighbouring buildings, back-to-back houses were notoriously ill-lit and poorly ventilated. Such was the initial lack of consideration for hygiene, that some houses were found to have been built over open drains covered only by boards. The term "back-to-back" should not be confused with "through" terraced houses, the backs of which face each other across an alleyway, and are thus not contiguous like a true