 ISAs were introduced on 6 April 1999, replacing the earlier personal equity plans (PEPs; very similar to a Stocks and Shares ISA) and Tax-Exempt Special Savings Accounts (TESSAs; very similar to a Cash ISA).Other tax-advantaged savings that predate ISAs include many offered by National Savings and Investments, a state-owned institution which has in the past offered a range of other tax-free accounts, in addition to its own ISAs.Junior ISAs, introduced in 2011, replaced the Child Trust Fund.