Continuous

From MTG Salvation Wiki

The word "continuous" on its own is an obsolete artifact supertype. In modern Magic, the word is primarily used to refer to continuous effects.

From the Comprehensive Rules

Continuous Artifact (Obsolete)
- Some older cards used the term "continuous artifact" on the card's type line. They were artifacts without activated abilities. Cards that were printed with the term "continuous artifact" now simply use "artifact."

Card types
Groups	Supertypes	Card types	Subtypes
Spell (non-permanent)		Instant	Trap	Arcane
Spell (non-permanent)		Sorcery		Arcane
Permanent	Basic, Legendary, Snow, World	Artifact	Equipment, Fortification, Contraption
		Creature	(...)
		Enchantment	Aura, Shrine
		Land	(...)
		Planeswalker	(...)
Miscellaneous		Tribal	(...)
		Plane	(...)
		Vanguard
Obsolete	Mono, Poly, Continuous	Interrupt, Mana Source