[1] Civil and general aviation aircraft equipped with reverse thrust are technically or theoretically able to use powerbacks as a means of "backing up" but such operation is prohibited or strongly discouraged by aircraft manufacturers as well as airport safety regulations in nations with actual aviation safety regulating agencies.
While many aircraft are physically capable of performing powerbacks, many companies impose restrictions on the practice, mainly due to the risk of FOD (foreign object damage) from debris propelled into the air.
This problem is magnified even more with planes having wing-mounted engines, as their proximity to the ground can exacerbate debris ingestion if powerbacks are used.
[3] For example, Northwest Airlines' fleet of DC-9 aircraft used powerback operations at certain airports, but discontinued the practice in 2005 citing the need to conserve fuel.
[5] In several US military aircraft such as the C-130 Hercules, the C-5 Galaxy and the C-17 Globemaster III, powerback operation is technically possible as demonstrated at civil airshows but there are severe limitations on the ability of all reverse-thrust capable aircraft to perform actual "pushback" on their own in actual service.