While the Bank of England stuck to treasuries, the Fed bought federally backed mortgage bonds in addition to treasuries. The Bank of Japan went further buying also corporate bonds, commercial paper, exchange traded funds and real estate investment trusts. The second wave of unconventional measures went beyond repo operations and OMOs.
The Bank of Japan extended targeted loans to banks to spur long term investment. The Fed supplemented two rounds of QE with “operation twist” – of purchasing longer term treasuries against sale of short-term treasuries in an effort to depress the entire yield curve rather than  10  BIS central bankers’ speeches  just its short end.